GE Entelli-Switch 250 manual Standard Transition R/T Box Schematic

Relay/Transformer (R/T Box) (cont’d)

Standard Transition R/T Box Schematic

20	21	22					30	31	32
		XN1		XN2		XE1			XE2
24V		10V	11V	10V	24V	10V	11V		10V

900 (18)

800

907

CCN CCE GND

901

801

902

903

904

803

804

807

806

805

906

905

(1)

J5

XN1 - SOURCE 1 CONTROLTRANSFORMER

XN2 - SOURCE 1 3 PHASE SENSINGTRANSFORMER XE1 - SOURCE 2 CONTROLTRANSFORMER

XE2 - SOURCE 2 3 PHASE SENSINGTRANSFORMER

SOURCE 2 24V OUTPUT

SOURCE 1 24V OUTPUT

3 PHASE SOURCE 2 SENSING

(BLANK)

(BLANK)

GROUND

CCE - COIL CONTROL RELAY (SOURCE 2) CCN - COIL CONTROL RELAY (SOURCE 1) COMMON

SINGLE PHASE SOURCE 2 SENSING

3-PHASE SOURCE 1 SENSING

SOURCE 1 CONTROL POWER

SOURCE 2 CONTROL POWER

Figure 15

Delayed / Closed Transition R/T Box Schematic

		20	21	22			30	31	32
											XN1 - SOURCE1 CONTROLTRANSFORMER
											XN2 - SOURCE1 3 PHASE SENSINGTRANSFORMER
		XN1		XN2			XE1		XE2		XE1 - SOURCE 2 CONTROLTRANSFORMER
						24V	10V				XE2 - SOURCE 2 3 PHASE SENSINGTRANSFORMER
	24V	10V	11V	10V				11V	10V
									900 (18)		SOURCE 2 24V OUTPUT
									800		SOURCE 1 24V OUTPUT
									907
											3 PHASE SOURCE 2 SENSING
									808		CCEO - COIL CONTROL RELAY (OPEN SOURCE 2)
									908
CCEO	CCN				CCNO	CCE					CCNO - COIL CONTROL RELAY (OPEN SOURCE 1)
									GND
											GROUND
									901		CCE - COIL CONTROL RELAY (SOURCE 2)
									801
											CCN - COIL CONTROL RELAY (SOURCE 1)
									902
											COMMON
									903		SINGLE PHASE SOURCE 2 SENSING
									904
									803
									804		3-PHASE SOURCE 1 SENSING
									807
									806		SOURCE 1 CONTROL POWER
									805
									906		SOURCE 2 CONTROL POWER
									905	(1)
										J5

Figure 16

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