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IS200EHFCH1A - 100 mm Thyristor Control Fan Controller Board is available in stock which ships the same day.
IS200EHFCH1A - 100 mm Thyristor Control Fan Controller Board comes in UNUSED as well as REBUILT condition.
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SPECIFICATIONS:
Part Number: IS200EHFCH1A
Manufacturer: General Electric
Series: EX2100
Product Type: 100 mm Thyristor Control Fan Controller Board
Board Function: Thyristor control of 100 mm axial fans
Fan Size Compatibility: 100 mm
Rated Load Current: 2.0 A
Control Type: Thyristor
Mounting: DIN rail
Operating Temperature: 0°C to +60°C
Input Voltage: 115–230 VAC
Size: 8.25 cm high x 4.18 cm
Repair: 3-7 days
Availability: In Stock
Weight: 2.5 Kg
Country of Origin: United States
FUNCTIONAL DESCRIPTION:
IS200EHFCH1A is a 100 mm Thyristor Control Fan Controller Board manufactured and designed by General Electric as part of the EX2100 Series used in GE Excitation Gas Turbine Control Systems. The IS200EHFCG1A Fan Control (EHFC) board is an optional board that mounts to the IS200EHPAG1B Gate Pulse Amplifier (EHPA) board used on EX2100 TM 100 mm Thyristor Control applications. An EHPA is located near the top front of each power converter in the 100 mm lineup. Depending on the specific application, there may be two, three, or four power converters. Each power converter also includes one or two cooling fans located on the top of the converter. For the lowest cost, a single fan can be supplied. Failure of this fan causes the power converter section to be down, but does not cause an outage of the generator.
The 100 mm thyristor control can be supplied with n+1 or n+2 power converter redundancy so that the full output rating can be achieved even when one power converter section is down. The 100 mm thyristor control can also be supplied with two fans per power converter section. Full converter rating is available with either fan running, so this configuration provides redundancy at the fan level. Either fan can fail and can be replaced online, without affecting the output of that power converter section. The EHFC is supplied in all 100 mm thyristor control applications that have two fans per power converter section and normally functions to control the two fans in a lead/lag manner. In lead/lag control, one fan is the active (lead) fan and provides cooling to the power converter. If the lead fan fails, the standby (lag) fan is started so that adequate cooling is maintained. In its normal configuration, EHFC provides the following features.
EX2100 FAN CONTROL AND MONITORING FEATURES:
OPERATION:
Both fans are never started simultaneously. There is always at least a five-second delay between closing the starters to reduce starting load on the fan power supply. At power-up, the fans do not automatically start unless JP2 is set for continuous operation. Otherwise, the only conditions that start the fans are gating of the SCR bridge or a Transfer command. If the Transfer button is depressed briefly, assuming lead/lag mode, the lag fan is started and tested first. Five seconds are allowed for the fan to come up to speed. If it does not, an alarm is indicated and sent to the control. After five seconds, the lead fan is also started and tested after another five seconds. At the end of the test, the fans will be stopped unless JP2 is set for continuous operation, or unless the bridge temperature is above 50°C (122 °F). If both fans passed the test, lead/lag assignments are swapped, so the next time a Start or a Transfer occurs, the new lag fan will start first. The behavior of the Transfer command is similar for dual and single fan modes. In dual mode, fan 2 is started first, then fan 1. There is no swapping of lead/lag assignments in dual mode. In single mode, only fan 1 is started and tested.
When the exciter is stopped, the fans also stop as soon as the bridge temperature falls below 50°C (122 °F), unless the continuous mode of operation has been selected. In all conditions, when fan failures are detected, appropriate alarms are sent to the exciter control, and if required, bridge cooling is not being provided, the bridge section trips and inhibits gating of its SCRs. Failure of the EHFC board also generally causes a fan failure alarm to be sent to the exciter control.
WOC maintains the largest inventory of Replacement parts for GE Excitation Turbine Control Systems. Additionally, we offer warranty-backed unused and rebuilt boards as well as board repairs for your damaged ones. For your OEM needs, our team of professionals is available around the clock. We at WOC are happy to help you with any needs you may have in terms of automation. Please contact our team by phone or email for pricing and availability on any components and repairs.
Why is the fan not starting when the system powers up?
If the fan fails to start upon system startup, it could be due to a lack of AC power supply to the fan controller board. Other common causes include a blown fuse, a failed thyristor, or issues with the gate trigger circuit. It is also important to check if the fan motor itself is functioning.
What does it mean when the lead fan fails to transfer to the lag fan?
A failure to transfer from the lead to the lag fan typically indicates that the lag fan is either non-functional or not receiving the proper control signal. This can happen if the lag fan motor is faulty, if the control system fails to issue the transfer command, or if there is a malfunction in the relay or output circuitry responsible for the switchover.
How do I identify a failed thyristor on the fan control board?
A failed thyristor can prevent the fan from receiving power or may cause erratic operation. Symptoms of thyristor failure include the fan not operating even when commanded, unusual heating around the component, or a complete short/open circuit at the thyristor terminals.
