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CHAPTER 2: USING THE RTT ON SR SERIES RELAYS
THE SR735/737 FEEDER PROTECTION RELAY
RTT DESKTOP TEST SET– INSTRUCTION MANUAL
45
2.5.3
RTT to SR735/737 Wiring Diagram
1.
Ensure that Wet/Dry Input Type switch is set to
DRY
before applying power to the RTT
unit. The SR735/737 Relay accepts only
DRY
contact connections to the RTT.
2.
Ensure that current and voltage knobs are turned fully counter-clockwise before
applying power to the RTT unit.
Note
*The 735/737 Relay doesn’t have Voltage Input, Switch Input and RTD Input features.
**Trip and Aux Common terminals (H5 and H6) must be hardwired together.
Table 2–5: SR735/737 with RTT Set to Dry
RTDs*
RTD3 +
RTD3 -
RTD3 C
RTD2 +
RTD2 -
RTD2 C
RTD1 +
RTD1 -
RTD1 C
SPARE
Contact
Outputs**
AUX COMMON
H6
---------------
RTT
TRIP COMMON
H5
-------------------------
OUTPUT C
AUX NO
G6
-------------------------
OUTPUT 2
TRIP NO
G5
-------------------------
OUTPUT
1
Contact
Inputs*
INPUT C
INPUT 8
INPUT 7
INPUT 6
INPUT 5
INPUT 4
INPUT 3
INPUT 2
INPUT
1
CTs
Phase 1 +
G1
-------------------------
I
+
Phase 1 COM
H1
-------------------------
I
-
VTs*
V
+
V
-