Exciter With Diagnostics

High Energy Ignition Diagnostics Identify Ignition Faults – BEFORE THEY HAPPEN During normal wear of igniter (spark plugs), they often “skip” or operate intermittently as they approach “end of life”. Chentronics offers a card that observes the release release of energy, and indicates if the average average is below minimum. In addition, this option integrates “Zero Voltage Contact” ON/OFF control and observes the quality of the input power source (allowing the operator to distinguish between the two most likely reasons for an ignition fault). The diagnost diagnostic ic circui circuitt is fail-sa fail-safe; fe; any fault fault of the diagnost diagnostic ic circui circuitt will not affect affect normal normal operat operation. ion. The diagnostics option is available for all configurations including: IGNITION FUEL

PACKAGING

APPLICATIONS

Gas

Safe, Hazardous Area

Burners, Pilots, Gas Turbines

Light Oil

Safe, Hazardous Area

Burners, Pilots, Gas Turbines

Diagnostics CHENTRONICS PO BOX 368, Norwich N.Y., U.S.A. TEL: (607) 334-5531

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EMAIL: [email protected] [email protected]

Contacts NORMAL OPERATION

During normal startup, the “LINE VOLT FAULT” contacts remain open until line voltage has reached approximately 60 VAC. Closing the “CLOSE TO START” terminals with power applied, the “OUTPUT FAULT” contacts will close for at least one second and remain closed (until a fault condition is recognized). Applying power with the “CLOSE TO START” terminals OPEN, the “OUTPUT FAULT” contacts will close for approximately one second and then open (until the “CLOSE TO START” terminals are closed).Applying power with the “CLOSE TO START” terminals CLOSED, the “OUTPUT FAULT” contacts will close for at least one second and remain closed (until a fault condition is recognized). “LINE VOLT FAULT” output terminals (3, 4)

When normal input power is applied (>60 VAC), K2 energizes closed. Without normal input power, K2 deenergizes open. These are isolated contacts capable of switching 0-400V (peak), 140mA AC/DC. The open contact leakage current will be less than 1.5mA. “CLOSE TO START” input terminals (-5, +6)

Closing (or shorting out) of terminals “+” to “-” energizes the exciter. This closure directs a signal to the CONVERTER enable circuit, to begin sparking. These terminals provide open circuit voltage 12 VDC. The isolated short circuit current is 12mA DC. “OUTPUT FAULT” output terminals (1, 2)

The “OUTPUT FAULT” contacts "energize closed during normal operation" and "de-energize open during fault conditions". These are isolated contacts capable of switching 0-400V (peak), 140mA AC/DC. The open contact leakage current will be less than 1.5mA. The diagnostic circuit confirms normal discharge by observing the release of energy from the energy storage capacitor. Exciter Failure

If the sensed voltage pulse rate is, lower (i.e. 15%) than the exciter specified spark rate. Igniter or Lead Failure

If the sensed current pulse rate is significantly lower (i.e. 30%) than the exciter specified spark rate. Please note that integration of the difference between the actual and expected rates over approximately one second prevents one or two consecutive missed pulses from causing a fault condition. This results in a delay of approximately one second between the fault and the indicator signal. FAULT CLEARING

The diagnostic “Fault” relay contacts will remain open until the exciter power reset, or the “CLOSE TO START” signal is removed (opened).


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EMAIL: [email protected]

Control Logic Diagram L1 INPUT POWER 85-265VAC -OR- 125VDC

INTERNAL POWER CONVERTER

12VDC INTERNAL POWER

L2 GND ENABLES SPARKING

K2 SOLID STATE PHOTOVOLTAIC AC/DC RELAY

LINE VOLT FAULT (OPEN = FAULT)

1K

ELECTRONIC

+

ENABLE

CLOSE TO START (USE MECHANICAL CONTACTS OR DC SOLID STATE RELAY)

CIRCUIT

K3

OUTPUT FAULT (OPEN = FAULT)

SOLID STATE PHOTOVOLTAIC AC/DC RELAY


Diagnostics Signal



Time Delay to Signal An output fault is indicated when the igniter spark rate is below 3.5 SPS. The time to signal (Td) is the delay time from when the spark rate (SR) drops below 3.5 SPS. The following table defines Td for a variety of spark rates. The following equation governs the delay time: Td = 3.5 / (3.5 – SR) SR (SPS)

0

0.5

1.0

1.5

2.0

2.5

3.0

Td (Seconds)

1

1.2

1.4

1.8

2.3

3.5

7.0

Exciter Input Current Characteristics PN 07001102, 4 SPS SUPPLY V RMS

NORMAL OPERATING CURRENT POWER ARMS OVER APEAK APEAK AFTER PIN WATTS SPARK PERIOD

85 120 230

0.8 0.9 0.5

BEFORE SPARK

1.2 1.5 0.9

INRUSH APEAK

SPARK

0.5 0.6 0.4

108 102

1.0 2.5

Time Delay to Signal An output fault is indicated when the igniter spark rate is below 3.5 SPS. The time to signal (Td) is the delay time from when the spark rate (SR) drops below 3.5 SPS. The following table defines Td for a variety of spark rates. The following equation governs the delay time: Td = 3.5 / (3.5 – SR) SR (SPS)

0

0.5

1.0

1.5

2.0

2.5

3.0

Td (Seconds)

1

1.2

1.4

1.8

2.3

3.5

7.0

Exciter Input Current Characteristics PN 07001102, 4 SPS SUPPLY V RMS

NORMAL OPERATING CURRENT POWER ARMS OVER APEAK APEAK AFTER PIN WATTS SPARK PERIOD

85 120 230

BEFORE SPARK

0.8 0.9 0.5

1.2 1.5 0.9

INRUSH APEAK

SPARK

0.5 0.6 0.4

108 102

1.0 2.5

Typical In-rush current duration is approximately 0.3 mS. The input terminal can accept up to AWG #12 (4-mm2 ) wire. Input power wiring should be as large as possible, taking into consideration the normal operating current noted above. The exciter has an internal 6.3 AMP Slow Blow fuse with an interrupt capability of 1500A. The dimensions are 5mm X 20mm. The fuse is CE marked and complies with I EC 127V. Diagnostics CHENTRONICS PO BOX 368, Norwich N.Y., U.S.A. TEL: (607) 334-5531



Input Wiring CONNECTIONS

A hole is positioned along side the output connector for input power entrance. The input wires should be AWG #16 or #12. Input power should be turned ‘OFF” at the source and steps should

be taken to ensure that it remains “OFF” before proceeding with the input wiring . Be sure to provide weatherproof connections. Inside the exciter, connect the single-phase input power to the L1 (Line), N (L2 Neutral) and G (Ground) terminations. The output wires connect to the output terminals labeled HV and LO (tagged green wire). The output harness wire marked with a GREEN TAG MUST CONNECT TO "LO".

The diagnostics board will allow a single set of contacts to "energize closed during normal operation" and "de-energize open during fault conditions". TERMINALS

CONNECTION DESCRIPTION

L1

AC or DC Line

Input Wiring CONNECTIONS

A hole is positioned along side the output connector for input power entrance. The input wires should be AWG #16 or #12. Input power should be turned ‘OFF” at the source and steps should

be taken to ensure that it remains “OFF” before proceeding with the input wiring . Be sure to provide weatherproof connections. Inside the exciter, connect the single-phase input power to the L1 (Line), N (L2 Neutral) and G (Ground) terminations. The output wires connect to the output terminals labeled HV and LO (tagged green wire). The output harness wire marked with a GREEN TAG MUST CONNECT TO "LO".

The diagnostics board will allow a single set of contacts to "energize closed during normal operation" and "de-energize open during fault conditions". TERMINALS

CONNECTION DESCRIPTION

L1

AC or DC Line

L2

AC or DC Line

GND

Earth Ground

CLOSE TO START

TERMINAL PAIR – Operator closes this set of contacts to energize exciter output

HI

High Voltage Output

LO

High Voltage Return

LINE VOLT FAULT

TERMINAL PAIR - Energize (close) when line voltage is sufficient to operate exciter

OUTPUT FAULT

TERMINAL PAIR - Energize (close) when output energy is OK

PHOTO: Diagnostics CHENTRONICS PO BOX 368, Norwich N.Y., U.S.A. TEL: (607) 334-5531

Internal Assembly PN 07070103D Page 5 www.chentronics.com FAX: (607) 336-7447


Exciter With Diagnostics

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