IS200TPROH1C GE Protection Terminal Board

Description:

The IS200TPROH1C is an Emergency Protection (TPRO) terminal board developed by GE. Three PPRO I/O packs are housed on the Emergency Protection (TPRO) terminal board. It has a pair of potential transformers (PTs) for bus and generator voltage input and conditions speed signal inputs for the PPROs. There are three DC-37 pin connectors on it, one on each side of the PPRO pack connectors. A cable leading to a Mark* VIe backup trip relay terminal board is accepted by each DC-37. TPROH1C has two pluggable blocks with 24 barrier terminals each.

Do not inadvertently cross-connect the 240 V ac and dc voltages in 240 V ac applications. The peak voltage will be higher than the MOV rating, causing the MOV to fail. Most ac supplies have a grounded neutral, so if an unintended connection between the 125 V dc and the ac voltage is made, the sum of the ac peak voltage and the 125 V dc is applied to MOVs connected between dc and ground. On the other hand, in 120 V ac applications, the MOV rating can endure the peak voltage without failing.

IS200TPROH1C Compatibility
TPROH1C is a simplex and TMR application that works with the PPRO I/O pack. TPROH#C links to three PPRO I/O packs in TMR systems. TPROH1CD and H12C both accept three PPROH1As for direct attachment and include DC-37 connections for three cables to the backup trip relay terminal boards.

IS200TPROH1C Installation
TPROH1C and a plastic insulator are mounted on a DIN-rail-mounted sheet metal carrier. The TPRO and insulator can also be mounted on a sheet metal assembly that bolts directly into a panel. Typical #18 AWG wires are used to connect speed signals and PT inputs to the terminal block. The TPROH1C barrier terminal block can be removed to replace the board. The TPROH2C is a removable Euro-Block type terminal block that can be plugged in.

IS200TPROH1C Operation
On terminals 31-48, nine-speed inputs are displayed. The consumer can get P24 output from Terminals 5, 9, and 11. The return path for the P24 output is Terminal 8 (MARET). ORing the 28 V power supply of I/O packs R, S, and T yield the P24 output. P24 V output can be accessed even if any of the I/O packs are turned off. Terminals 6, 10, and 12 are 4-20 mA inputs that are fanned to R, S, and T PPRO connections and are allocated for future control extensions. For the 4-20 mA input, Terminal 8 (MARET) serves as a return path.