GE Entelli-Switch 250 User Manual download pdf (Page 26)

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26 GE Zenith Controls

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Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)

Standard Transition

Each MX250 microprocessor based ATS controller

requires a relay/transformer box to apply line voltage to

the ATS operator via coil control relays. Also required is

power for the MX150 printed circuit board and an appli-

cation of sensing voltage proportional to line voltage.

This is accomplished by the relay transformer box. This

method of switching operator voltage and applying power

and sensing voltage to the printed circuit board isolates

R/T Box Primary 1 VA 25 VA

Assembly Voltage XFMR XFMR

Part No. at 50/60 Hz Part No. Part No.

57P-1015 120V K-3216 K-3224

57P-1016 208-220V K-3217 K-3225

57P-1017 230-240V K-3218 K-3226

57P-1018 277V K-3219 K-3227

57P-1019 380-400V K-3220 K-3228

57P-1020 416-440V K-3221 K-3229

57P-1021 460-480V K-3222 K-3230

57P-1022 575-600V K-3223 K-3231

Relay/Transformer (R/T Box)

40-225 Amp Molded Power Section

Transformer Usage (see Figure 12)

Item Part No. Description Qty

1 See Chart Transformer (1 VA) 2

2 See Chart Transformer (25 VA) 2

3 K-1274 Relay Flange Mounted 2

Bill of Material

R/T Box Primary 1 VA 25 VA

Assembly Voltage XFMR XFMR

Part No. at 50/60 Hz Part No. Part No.

50P-1026 120V K-3216 K-3224

50P-1027 208-220V K-3217 K-3225

50P-1028 230-240V K-3218 K-3226

50P-1029 277V K-3219 K-3227

50P-1030 380-400V K-3220 K-3228

50P-1031 416-440V K-3221 K-3229

50P-1032 460-480V K-3222 K-3230

50P-1033 575-600V K-3223 K-3231

40-3000 Amp - All Other Standard Types

Transformer Usage (see Figure 13)

Item Part No. Description Qty

1 See Chart Transformer (25 VA) 2

2 See Chart Transformer (1 VA) 2

3 K-1260 Coil Control Relay (24V) 2

Bill of Material

SEC.

PRI.

SEC.

PRI.

SEC.

PRI.

the MX250 from the line voltage, further protecting

the controller from harmful line transients. Two versions

of the R/T box exist depending on the type of ATS

(standard transition or delayed transition).

The following layout drawings of the R/T Box compo-

nents (standard and delayed transition) include a bill of

materials for replacement parts. Schematics are included

to indicate proper wiring.

(inside)

Figure 13

Figure 12

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GE Entelli-Switch 250 User Manual Page 26

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