GE Entelli-Switch 250 manual Relay/Transformer R/T Box

Relay/Transformer (R/T Box)

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

1

2

(inside)

3

Figure 12

40-225 Amp Molded Power Section

Transformer Usage (see Figure 12)

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

Bill of Material

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

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.

PRI.	PRI.
PRI.

SEC.		1
SEC.	SEC.

2

3

Figure 13

40-3000 Amp - All Other Standard Types

Transformer Usage (see Figure 13)

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

Bill of Material

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

■ 26 Entelli-Switch 250 Operation and Maintenance Manual (71R-2000) GE Zenith Controls ■