Micro BBU (1)

Installation Guide

3 3 0 . 3 3 4

Information in this document is subject to change without notice and does not represent a commitment on the part of Eltek Energy AS. No part of this document may be reproduced or transmitted in any form or by any means — electronic or mechanical, including photocopying and recording — for any purpose without the explicit written permission of ELTEK Energy.

Copyright ©: Eltek Energy AS, Norway 2005 NS-EN ISO 9001:1994 Certifícate no: 900005Q NS-EN ISO 14001:1996 Certifícate no: 900005E. This product holds a CE mark and satisfies all requirements covering relevant standards and directives.

EMC ▫

▫

▫

LVD

EN61000-6-2 Industrial Environment EN61000-6-3 Residential, Commercial and Light Industry ETS 300386 v1.3.1 Telecommunication Equipment

▫

▫

▫

LVD73/23/EEC Low Voltage Directive EN60950 Safety of Technology Equipment UL60950,UL1801

Certificate no: 900005

Certificate no: 900005E

POWER DISTRIBUTION CENTER FOR COMMUNICATIONS EQUIPMENT 9N73

Art. No. 351433.033

Issue 1,

2005 August

Published 2005-08-18 ESB.

Flatpack PSB 3kW, 48VDC (Outdoor Power Cabinet) has part no. 105417 Installation Guide Flatpack Flatpack MicroPower MicroPower Outdoor Cabinet, Cabinet, Art. 351433.033, v1-2005-08

TABLE OF CONTENTS

1 DESCRIPTION OF FLATPACK PSB 3KW, 48VDC IMPORTANT

4 4

NOTICES

OVERVIEW – GENERAL ARRANGEMENT, INPUT

AND DISTRIBUTION ARRANGEMENT

BLOCK DIAGRAM

5 5

AC INPUT TERMINAL DC DISTRIBUTION

6

BLOCKS

AND LVBD DEVICE

7

2 INSTALLATION PROCEDURES

8

SAFETY PRECAUTIONS

8

MECHANICAL INSTALLATION Organize the installation site Get the installation tools ready Prepare AC mains supply Remove packaging and check equipment Lifting the cabinet Position and fasten the cabinet Wind resistance Preventing condensation Mount the batteries on the shelf. Fixing point for temperature sensor

9 9 9 9 10 10 11 12 12 13 13

• • • • • • • • • •

ELECTRICAL INSTALLATION 14 Cable access for outdoor MicroPower cabinet and battery cabinet 17 Block Diagram 18 About Negative DC Distribution 19 About AC, DC Earthing Systems 19 Rectifier Installation — Handles and Locking Mechanism 20 Commissioning 20 Installation and maintenance instruction for filter mat for M icroPower Cabinet 21 • • • • • • •

3 ALARM RELAY OUTPUTS AND SIGNAL CONNECTIONS ALARM

About Fail-Safe Operation Mode Connections for Internal system wiring

23 24 24

COMPENSATION SLOPE

25

RELAY SPECIFICATION

• •

TEMPERATURE

23

CHARGING VOLTAGE DEFAULT VALUE

Installation Guide Flatpack MicroPower Outdoor Cabinet

25

Art. 351433.033, v1-2005-08

1

Description of Flatpack PSB 3kW, 48VDC

This Installation Guide contains information about how to install the Flatpack PSB 3kW, 48VDC system, for the outdoor power cabinet (fan cooled).

Important notices

DEVICE

WARNING: Cabinet must not be lifted using eyebolts when batteries are fitted

HAZARD

To be installed only in restricted access areas or the like, in accordance with articles 110-16, 110-17, and 110-18 of the National Electrical Code, ANSI/NFPA 70. ˚

For supply connectors’ use wires suitable for at least 75 C Type: FEPW, RH, RHW, THHW, THW, THWN, ZHHW, USE, ZX or similar. Use copper conductors only. The over voltage protection kit contains a class C protection. This requires an external class B protection on the system’s mains feed .

Installation Guide Flatpack MicroPower Outdoor Cabinet, Art. 351433.033, v1-2005-08

Page 4 of 28

Overview – General Arrangement, Input and distribution arrangement The Flatpack PSB 3kW, 48VDC is a DC power supply system based on the Flatpack 1500 48V rectifier. The system contains AC terminal blocks, DC distribution, Flatpack Power Rack and Flatpack 1500 rectifier modules. The system is designed for cable entry trough locknuts underneath. The cabinet size is 590x427x775mm, (23,2 x 16,8 x 30,5”) (WxDxH).

BTS breaker

Flatpack 1500 rectifier modules Control card with alarm terminals and LVBD device

Battery breaker

Temp. Probe

Battery Shelf

OVP Kit (option)

Heater Kit 2-pol AC breaker

(option)

(option)

Figure 1 Flatpack Power Rack System

General Arrangement

Block Diagram Outdoor battery cabinet*

MicroPower Outdoor cabinet OVP*

BTS1

Flatpack

Telecom equipment

BTS2* AC terminal blocks

Telecom equipment

2-pole AC breaker*

Rack 1x2u

DC distribution

Heater* *Optional Kits

Figure 2. Block diagram.


Page 5 of 28

AC Input Terminal blocks The AC terminal blocks are factory configured for mains supply type: 230V AC, 1 phase. The AC DIN rail is designed for mounting of an over voltage protection (OVP) kit and an internal 2-pole AC input breaker. See the respective manuals for further information.

L1

PE

N

N

L1

Figure 3 Example picture AC input terminals, L1 & N with OVP and AC breaker installed.


Page 6 of 28

DC Distribution and LVBD device The system is configured for negative distribution. The standard distribution is equipped with 1 battery breaker (Fb1) and 1 BTS load breaker (F1). The load breaker is a double pole type. If both poles are connected in parallel with the copper fish-plate the breaker will be rated at 32A. If the bottom fish-plate is removed and only 1 pole is used for the load, the breaker is rated at 16A. Between Fb1 and F1 there is free space for a second BTS load breaker and a terminal block for an external battery back-up. Both the second BTS load breaker and the battery terminal block are options delivered with their respective kits. See the installation manual for both kits for further info.

F1 Fb1 +VE

51mm

CBI

CBI

60A

32A

I

I

TRIP

TRIP

0 CURVE U2

0 CURVE U2

QY-1(13)-D

QY-2(13)-D

80V

80V

10 kA

10 kA

+

+

0V Load and Battery

-48V Battery -48V Load Costumer connections

BASIC BUILD

Figure 4 DC distribution.


Page 7 of 28

2 Installation Procedures This section describes how to install the Flatpack PSB 3kW, 48VDC . A step-by-step procedures will guide you through the installation. For full description of the Flatpack Rectifier and the Flatpack MCU monitoring and control unit, please refer to the Operation Guides for the respective modules.

Safety Precautions



The equipment described in this manual must only be installed by authorized personnel, and only operated by persons who have attended a suitable Eltek Energy training course.



The equipment represents an energy hazard and failure to observe this could cause terminal injury and invalidate our warranty.



There are hazardous voltages inside the rectifier system. As the rectifier units incorporate large charged capacitors, it is dangerous to work inside the system even if the mains supply is disconnected.



Products into which our components are incorporated have to comply with a number of requirements. Installation is to be in accordance with the recommendations herein.



Please read the manual carefully before using the equipment.


Page 8 of 28

Mechanical Installation Organize the installation site Begin preparing the installation site, tools, AC supply cables and fuses, etc Check that clearances in front and over the cabinet are sufficient for cooling and to facilitate operation and cable entry. Also, ensure that the site is ventilated adequately in a non-explosive atmosphere.

Get the installation tools ready Always use insulated tools suitable for telecom installations (screwdrivers, wire cutters, spanner and socket wrenches, etc.)

TOOLS recommended tools needed on the installation of OEM systems

Phillips No.3

Battery shelf

Flat screwdriver 3mm

All Terminal clamps, screw or spring clamps

Flat screwdriver 4,5mm Flat screwdriver 6mm Flat screwdriver < 3mm

Release of rectifiers+ spring connections to alarm/controller card

Posidrive No2 (Flat screwdrivers also suited)

OVP, BTS and AC fuses

Socket wrench 10mm

Common earth and battery poles

Prepare AC mains supply Prepare the following AC input cables and external AC input breaker: External AC Fuse & AC Input Cables (Recommended ratings for certain output power values)

AC Mai ns Type 230VAC, 1 phase

3.6kW incl usiv e heater

30A –C char. 2x4sqrmm cable - Max 30m

NOTE! An external breaker is required on all sites. This must be turned OFF under all installation.


Page 9 of 28

Remove packaging and check equipment Eltek Energy’s products include semiconductors and

Special treatment of circuit boards (ESD-sensitive equipment)

Device hazard

circuits which are protected against overvoltage and electro static discharge (ESD), to comply with applicable parts of the EMC directive. When handling circuit boards, you must use special aids and handling methods which prevent damage, in accordance with NS-ISO-9001.

CAUTION: The product can be damaged, perform poorly or have reduced lifecycle if exposed to incorrect treatment during transport,

installation or servicing.

Check that you have received all the parts — cabinet, modules, batteries (if applicable), documentation, etc. — and inspect them for physical or transit damages; contact Eltek Energy otherwise. Protect all the parts. To facilitate transport, standard Flatpack outdoor MicroPower deliveries consist of two strong packages on pallets: one contains batteries, the other the cabinet.

Lifting the cabinet Open the cabinet door and demount the 2 screws in the front. Take off the roof. Unscrew these 2 screws and take the roof off.

Fix straps to the eye-bolts. Close the door again so the door does not swing during lifting. Lift the cabinet via the straps with lifting equipment to its intended position. Balance the weight. Eye-bolts.

Remove the straps and remount the roof once the cabinet has been moved and fixed to its installation position. Installation Guide Flatpack MicroPower Outdoor Cabinet, Art. 351433.033, v1-2005-08

Page 10 of 28

Position and fasten the cabinet Flatpack PSB 3kW, 48VDC, Outdoor Power Cabinet has different mounting possibilities; Pole mounting, Wall mounting and Floor mounting options are available. Please refer to the Installation guides for the respective mounting kit. Pole

Pole mounting kit makes it possible to mount the Micropower Outdoor Cabinet to a pole with minimum diameter 60mm and maximum diameter 115mm. Floor

The floor mounting kit is intended for mounting the Micropower Outdoor Cabinet to a pad/floor. 480mm

200mm

Four M8 holes for fixing the plinth to the ground

Two M8 screw holes for fixing the cabinet to the linth

250mm

410,5mm

505mm 545mm

Figure 5 Drilling template floor mounted plinth. Wall

The Micropower Outdoor cabinet can be mounted to a wall with the wall mounting kit.

Top of cabinet 400mm 160mm

Upper wall mount bar

505mm Hole for wall

Lower wall mount bar 85mm Hole for cabinet Bottom of cabinet

Figure 6 Drilling template wall mounting kit. Installation Guide Flatpack MicroPower Outdoor Cabinet, Art. 351433.033, v1-2005-08

Page 11 of 28

530mm

Wind resistance Cabinets are tested according to GR 487. Depending upon the geographic location of a cabinet, exposure to high wind speed wind gusts is often a threat. Unbalanced forces may be applied to pole or wall mounted cabinets resulting in a turning moment. Pole or wall mounted cabinets are capable of resisting the turning moment resulting from a 67m/s wind gust acting on half of the front or rear of the cabinet surface, without damage to the mounting hardware. Plinth mounted cabinets are capable of resisting the overturning moment resulting from a wind gust of 67m/s perpendicular to the largest vertical surface.

Preventing condensation Condensation might be a problem in case the cabinet is left unpacked overnight without powering it up. In order to avoid condensation put drying agent next to the system and pull a plastic bag over the cabinet. It is important to cover the roof (air outlet) and the air inlet gills on the door. The system is packed in a plastic bag at delivery. This bag can be wrapped around the system. Only fresh drying agent should be put inside. Use tape and/or rubber bands to tighten the plastic bag to the cabinet.

Adhesive tape

Figure 7 Cabinet wrapping.

Drying agent


Page 12 of 28

Mount the batteries on the shelf. Lift and position the batteries (PRSB system only) on the shelf. Fit the inter-links between the batteries. Do not terminate the battery cables yet.

Use lifting straps for heavy batteries; Read the site specific drawings for the type and number of batteries.

Electric shock

WARNING: The batteries represent a major energy hazard. To avoid short-circuit of battery poles, you must always remove metallic objects — uninsulated tools, rings, watches, etc. — from the vicinity of the batteries.

Fixing point for temperature sensor It is recommended to place the temperature sensor in the middle of the battery bank. Fix the sensor with a cable tie to the inter-link between battery number 2 and 3.

Temperature sensor

Figure 8. The temperature sensor fixed with a cable tie to the inter-link between battery no. 2 and 3.


Page 13 of 28

Electrical Installation

CAUTION: For safety reasons, the commissioning and configuration of the equipment is only to be performed by Eltek’s personnel or by authorized and qualified persons; otherwise the warranty may be invalidated.

Qualified

personnel

Please, read the user documentation carefully before installing and using the equipment, as installation and operation is to be performed as described. WARNING: Opening the equipment may cause terminal injury — even if the mains AC supply is disconnected. Hazardous voltages may be present inside, as large capacitors may still be charged.

Electric shock

For location of components, see Figure 1 -page 5.

Installation 1. PREPARATION

Comments

OK

To ease access to the DIN rail, located at the bottom of the Outdoor MicroPower cabinet, it might be necessary to remove the factory mounted battery shelf. •

•

Remove four PAN screws minding the nuts for square hole in rack. Pull battery shelf out.

Cable entry is from bottom of cabinet. See Figure 9. The cable glands are mounted the wrong way in order to avoid transport damages to them.

2. CABLE ENTRY

•

Demount all the cable glands and mount them the correct way.

Pre installation

Post installation

Cut along the dashed lines

•

•

Cable gland •

Remove the metal disc in the cable glands to be used. Leave this metal disc in all un-used cable glands in order to ensure full IP protection. Make a cut in the rubber sealing inside the glands. Make the cut smaller than the cable diameter. See picture to the left. Pull the cables through the glands. All cables should be pulled at least 10mm too far inside the cabinet and then be pulled a little bit back again. This will lock the cable in the gland and ensure full IP protection.


3. AC CONNECTIONS

•

•

•

Switch OFF the AC input power (external MCB), before connecting the mains cables. Connect the external AC ground wire (min. 4 mm²/max. 10mm²) to the mains Protective Earth (E) terminal block. Connect the AC cables (min. 4 mm²/max. 10mm²) to the terminal blocks. Do not power up the system until the whole installation is complete.

4 2 8 O 8 G / 2 A 2 / 2 W 1 8 8 2 2

1 1 L L

4 2 8 O 8 G / 2 A 2 / 2 W 1 8 8 2 2

N N

E

PE

L

N

Mains input

4. LOAD CONNECTIONS

• •

Turn OFF the Load/BTS MCB. Customer connection is at the bottom of all MCBs. Connect the load cable to the double pole breaker F1. For 35A load connect to the cable to the copper link. For 16 A load remove the copper link and connect the cable to either of the F1 poles. F1 Fb1 +VE CBI

60A

CBI

32A

I TRIP

I TRIP

0 CURVE U2

0 CURVE U2

QY-1(13)-D

QY-2(13)-D

80V

80V

10kA

10kA

+

+

0V Load and Battery -48V Battery

5. BATTERY CONNECTIONS

•

•

-48V BTS Load

Connect the loose end of the battery cables to the battery terminals; blue cable to the negative terminal and black cable to the positive terminal. Connect all battery inter-links. Fix the temperature sensor to the battery bank. For location of temperature sensor see `Fixing point for temperature sensor` Figure 8.


COMMISSIONING

Comments Switch ON external (and internal, if additional AC breaker kit is installed) AC breaker. Measure and verify that the AC input voltage is correct.

6. POWER UP

7. MOUNT ALL RECTIFIER MODULES IN THE POWER SHELVES

8. TURN ON THE LOAD

Make sure that rectifiers are firmly plugged in, and all handles in locked position. Ensure all rectifiers are ON and no alarms are present.

Measure and verify that the output voltage is correct.

BREAKER

Check that the batteries are connected correctly before turning the battery breaker on.

9. TURN ON THE BATTERY FUSES

MAINTENANCE

Comments

10.VERIFY THAT THE EQUIPEMENT IS FREE FROM DAMAGE, DUST OR DIRT

11. ALL CABLING AND COPPER BARS ARE SECURELY TERMINATED AND SUPPORTED

12. ALL

RECTIFIER MODULES ARE ON, NO ALARM PRESENT

13. RECTIFIERS

LOAD CURRENT SHARING

Carefully vacuum clean or remove any accumulation of dust corrosion or dirt. Especially notice to clean the grill in front of the filter mat. See ‘Installation and maintenance instruction for filter mat for MicroPower Cabinet’. Correct any loose connections, excessive cable temperature, defective insulation, etc.

Replace faulty rectifiers.

Verify that the LEDs illuminated on each rectifier’s bar graph are equal (±1LED).


Cable access for outdoor MicroPower cabinet and battery cabinet

Figure 9 View on inside of cabinet base

APPLICATION

POWER CABINET

BATTERY CABINET

HOLE E1, CABLE DIA 13.0 TO20.0mm

HOLE J1, CABLE DIA 9.0 TO 16.0mm

FOR 3X4.0mmSQ OR 3X6.0mmSQ

FOR 3X2.5mmSQ

BTS1

HOLES G1 &G2, CABLE DIA 5.0 TO10.0mm

------

BTS2

HOLES G3 &G4, CABLE DIA 5.0 TO10.0mm

------

BATTERY

HOLES F2 &F3, CABLE DIA 7.0 TO12.0mm

HOLES F2 &F3, CABLE DIA 7.0 TO12.0mm

ALARM

HOLES G5, CABLE DIA 5.0 TO10.0mm

------

GROUND

HOLES F1, CABLE DIA 7.0 TO12.0mm

HOLES F1, CABLE DIA 7.0 TO12.0mm

DC CONTROL

HOLES H1 & H2, CABLE DIA 2.0 TO 5.0mm

HOLES H1 & H2, CABLE DIA 2.0 TO 5.0mm

SPARE

HOLES E2 & E3, CABLE DIA 13.0 TO 20.0mm

HOLES E2 & E3, CABLE DIA 13.0 TO 20.0mm

AC input


Block Diagram y r t . e x t t a e y B l l p a p n r 2 1 y r u e t e s S S t t x C T T a E D B B B + + + + +

1 S T B -

2 S T B -

E V + 1 F

. t x e y l p p u s C D -

2 F

2 t ) x n e o F i t p o (

y r e t t a B -

y r e t t a B l a n r e t x E -

N A F

t t a b . t x E -

1 b F

n a F -

n a F +

D B V L

0 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 1 1 1 1 1 1 1 1 1 4 n o C

m t k e c s y a S p t a r l e F w o P

+

L N

-

E P

-

+

L N

E P

) 5 4 J R ( 3 M O C

8

e c d m a r r f a a r l e o A t B n I

) 5 4 J R ( 1 J

1 n o C

6 n o C

1 2 3 4

1 2 3 4

e e n s i l - u n f I

) n o i t p o ( P V O N

s t n u L N E i P a p n I M s r e n k i ) a a n e i o m r t e b p l o t O p u p ( n 2 i

L

r e t a ) e n o H i t y r p e o t t ( a B

+ - e r u r t a r o s T e p n e m s e T

Figure 10. Block diagram of Micropower Outdoor Cabinet with all options installed.


About Negative DC Distribution

Common DC Rail +

— — — Negative DC Distribution

d a s o e r L i C w D

In 48VDC power supply systems for Telecom equipment, it is common practice to use a positive DC rail as a common positive output. On the other hand, the negative DC outputs are “distributed” over all load breakers/fuses. This practice is denominated as “Negative DC Distribution ”.

About AC, DC Earthing Systems The AC earth is connected to the system’s chassis. Also the positive DC output from the rectifiers is connected to chassis. If required this DC earth connection to chassis can be removed in order to separate AC earth and DC earth. All DC outputs must then be connected to Telecom earth (TE).

PE (Protective Earth) TE (Telecom Earth) EG (Exchange Ground)

Common earth

Link 2 DC Earth

Chassis

Flatpack PSS AC Mains

AC Mains In ut

PE

EG

Link 1 (AC Earth)

Common DC Rail

TE

. DC Load Circuit

Chassis

Figure 11


Rectifier Installation — Handles and Locking Mechanism The Flatpack 1500 rectifier module is equipped with handles that serve two purposes:

1.1.1.1

Locking the module into position Open both handles, insert and plug the module into power shelf. Then lock it into position by rotating the handles upwards and pushing them firmly home; failure to do so will prevent the module from making proper contact.

Figure 12 Module with released handles

1.1.1.2

Pulling the module out

Unlock and release the handles by inserting a small screwdriver into the upper holes, thus releasing the spring mechanisms. Do not use excessive force. The handles will release and pop out. When both handles are released, use them to pull the module out.

Upper hole to release the spring mechanism

Do not hold or carry the rectifier by its handles. Handle in locked position

Figure 13 Releasing the module handles

Commissioning For information regarding system commissioning, please read manual “Quick Start Guide Flatpack PS System“, art.no. 356803.103.


Installation and maintenance instruction for filter mat for MicroP ower Cabinet 1. Open the front door of the cabinet by operating the swing handle.

Figure 14.

Door with filter

2. Pull the filter mat out of the rectangular aperture at the inside of the front door.

Figure 15.

Pull out the filter

3. Fit the filter mat into the aperture in the opposite way of item 2.

Figure 16.

Fit the new filter

 Please consider the right direction of the filter. The side with the higher density (harder surface) is to fit towards the door side and is not visible to the user. Wrinkled surface towards the door.

Smooth surface visible from inside of door. Figure 17. Direction of filter. Installation Guide Flatpack MicroPower Outdoor Cabinet, Art. 351433.033, v1-2005-08

Make sure that the grill in front of the filter is free from damage, carefully vacuum clean or remove any accumulation of dust and dirt.

The filter should be replaced by a new one with same density and material quality (EU5 grade acc. to EN 779, Eltek part nr. 200892). Under normal operational conditions (normal industrial recommend to change the filter on a yearly period.

pollution)

we

Under ambient conditions with high pollution and near the coast we recommend to change the filter twice a year or shorter. The pollution of the filter can be detected by durable increase of the internal cabinet temperature without any failure of the fan or/and the change of the colour of the mat from white to grey/dark grey.


3 Alarm Relay Outputs and Signal Connections The alarm relays are operated in fail-safe, i.e. the relays are energized when there is no alarm. If several external devices are going to the same digital input, they must be connected in series. The description below describes the pin out in normal state, i.e. the NO output is open in normal operation and shorts to the COM output in the alarm-state.

Alarm relay specification Nominal switching capacity

2A/30V DC

Maximum switching power

60W (resistive load)

Maximum switching voltage

220V DC

Maximum switching current

2A DC

1-15 alarm relays

CON 4

16-19 Control relays

Figure 18. Alarm relay outputs

CON 4 Pin Assignments For Analog Controller card- Micro Power Pin

Signal

Function

Pin

Signal

Function

1

NO

Relay 1:

10

NO

Relay 4:

2

Com

Low Voltage Alarm

11

Com

Low Temp Alarm

3

NC

42±0,5Vdc

12

NC

Below -5°C ±1-2°C

4

NO

Relay 2:

13

NO

Relay 5:

5

Com

Module Fail Alarm

14

Com

Mains abnormal alarm

6

NC

15

NC

Below85Vac or above 300Vac

7

NO

Relay 3:

16

NO

Relay 6:

8

Com

High Temp Alarm

17

Com

LVBD Control

9

NC

Over 40°C

Disconnect at 39±0,5Vdc

±1-2°C

18

NO

Relay 7:

19

Com

Fan Control Fan ON: +25°C

±1-2°C

Fan OFF: +18°C±1-2°C


About Fail-Safe Operation Mode All Flatpack PSS alarm outputs use the Fail-Safe Operation Mode (relay coils energized in the system’s normal operation mode). In order to implement fail-safe digital inputs circuits, the external relay coil must be energized and the contact closed in the system’s normal mode of operation. Normal NC

+

COM NO

-

Relay X (Energized coil)

Alarm Relay X

(De-energized coil)

NC

+

COM NO

-

Correct Use of Alarm Outputs (example)

Figure 19

Connections for Internal system wiring

Figure 20 CON 1 Pin Assignments

CON 6 Pin Assignments

For Analog Controller card- Micro Power

For Analog Controller card- Micro Power

Pin

Signal

Pin

1

L

2

N

Function

Signal

AC Mains

Function

Temperature Probe 1

+

Red

2

-

Blue

3

N

Heater Control

4

L

Heater ON: +5°C

3

+

Red

Heater OFF: +15°C

4

-

Blue

System Voltage


Temperature compensation slope The MicroPower alarm interface board controls the battery charging voltage according to the ambient temperature measured by the temperature sensor. The charging voltage drops when the temperature rises in order to protect the batteries from damage.

58V

e g a t l o v e g r a h C

56V

54V

52V

50V

48V

-10°C

0°C

10°C

20°C

30°C

40°C

50°C

60°C

Ambient temperature

Figure 21. Temperature compensated battery charging.

Charging voltage default value Charging voltage default value is set to 54,48VDC at 20°C, with slope 96mV/°C (4mV/°C per cell).




Main Office:

Eltek Energy A S P.O. Box 2340 Strømsø N-3003 DRAMMEN Norway Phone: Fax:

47 32 20 32 00 47 32 20 32 10

mailto:[email protected] E-Mail: [email protected]

Internet:

www.eltekener

.com

Micro BBU (1)

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