GE IS200ICBDH1ABA MARK VI CONTROL CARD

Description

GE General Electric Technical Specifications: IS200ICBDH1ABA

The IS200ICBDH1ABA has a dual primary isolating transformer for

ground CT connections. There are no internal ground con

nections on the ground current inputs. The ground CT cir

cuits are shorted by automatic mechanisms on the case if

the unit is withdrawn. The 1 A tap is used for 1 A or 5 A

secondary CTs in either core balance or residual ground

configurations. If the 1 A tap is used, the IS200ICBDH1ABA measures up

to 20 A secondary with a maximum ground CT ratio of

10000:1. The chosen ground CT must be capable of driv

ing the ground CT burden (see SPECIFICATIONS).

The HGF ground CT input is designed for sensitive ground

current detection on high resistance grounded systems

where the GE Power Management HGF core balance CT

(50:0.025) is used. In applications such as mines, where

earth leakage current must be measured for personnel

safety, primary ground current as low as 0.25 A may be

detected with the GE Power Management HGF CT. Only

one ground CT input tap should be used on a given unit.

Only one ground input should be wired. The other

input should be unconnected.

The IS200ICBDH1ABA has four voltage transformer inputs, three for generator terminal voltage and one for neutral voltage. There are no

internal fuses or ground connections on the voltage inputs. The maximum VT ratio is 240.00:1. The two possible VT con

nections for generator terminal voltage measurement are open delta or wye (see Figure 2–9: TYPICAL WIRING DIAGRAM

on page 2–7). The voltage channels are connected in wye internally, which means that the jumper shown on the delta

source connection of the TYPICAL WIRING DIAGRAM, between the phase B input and the 489 neutral terminal, must be

installed for open delta VTs.

Polarity of the generator terminal VTs is critical for correct power measurement and voltage phase reversal

operation.

2.2.7 DIGITAL INPUTS

There are 9 digital inputs that are designed for dry contact connections only. Two of the digital inputs, Access and

Breaker Status have their own common terminal, the balance of the digital inputs share one common terminal (see

Figure 2–9: TYPICAL WIRING DIAGRAM on page 2–7).

In addition, the +24 V DC switch supply is brought out for control power of an inductive or capacitive proximity probe. The

NPN transistor output could be taken to one of the assignable digital inputs configured as a counter or tachometer. Refer to

the Specifications section of this manual for maximum current draw from the +24 V DC switch supply.

DO NOT INJECT VOLTAGES TO DIGITAL INPUTS. DRY CONTACT CONNECTIONS ONLY.

2.2.8 ANALOG INPUTS

Terminals are provided on the IS200ICBDH1ABA for the input of four 0 to 1 mA, 0 to 20 mA, or 4 to 20 mA current signals (field program

mable). This current signal can be used to monitor any external quantity such as: vibration, pressure, field current, etc. The

four inputs share one common return. Polarity of these inputs must be observed for proper operation The analog input cir

cuitry is isolated as a group with the Analog Output circuitry and the RTD circuitry. Only one ground reference should be

used for the three circuits. Transorbs limit this isolation to ±36 V with respect to the 489 safety ground.

In addition, the +24 V DC analog input supply is brought out for control power of loop powered transducers. Refer to the

Specifications section of this manual for maximum current draw from this supply

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The maximum number of 8-Channel Analog Current/Voltage Output modules that can be installed

in a system are:

4 in a system using CPU Models 311, 313, or 323

8 in a system using CPU Model 331

32 in a system using CPU Models 340 and 341

64 in a system using CPU Models 350 – 364

Other Configuration Considerations

When planning the module configuration for your application you must also consider the load

capacity of the installed power supply and the total load requirements of all modules that are

installed in the baseplate.

Refer to Chapter 1 in this manual for details on power supply, baseplate, and module load

requirements. The following table lists the specifications for this module. Note that test conditions,

unless otherwise noted, are: VUSER = 24 VDC at an ambient temperature of 25 C (77 F)

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