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CHAPTER 4: MOTOR MANAGEMENT & METERING THE 239 MOTOR MANAGEMENT RELAY
RTT DESKTOP TEST SET– INSTRUCTION MANUAL
69
4.2.4
RTT to 239 Relay Wiring Diagram
1.
Ensure that Wet/Dry Input Type switch is set to
DRY
before applying power to the RTT
unit. The 239 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
*Trip and Alarm Common terminals (24 and 27) must be hardwired together.
**The 239 Relay doesn’t have Voltage Input function.
Table 4–2: 239 Relay with RTT Set to Dry
RTDs
RTD3+
9
-------------------------
RTD3 +
RTD3-
10
-------------------------
RTD3 -
RTD3 COM
11
-------------------------
RTD3 C
RTD2+
5
-------------------------
RTD2 +
RTD2-
6
-------------------------
RTD2 -
RTD2 COM
7
-------------------------
RTD2 C
RTD1+
1
-------------------------
RTD1 +
RTD1-
2
-------------------------
RTD1 -
RTD1 COM
3
-------------------------
RTD1 C
SPARE
Contact
Outputs*
ALARM COMMON
27
---------------
RTT
TRIP COMMON
24
-------------------------
OUTPUT C
ALARM NO
26
-------------------------
OUTPUT 2
TRIP NO
23
-------------------------
OUTPUT
1
Contact
(Digital)
Inputs
Switch Common
38
-------------------------
INPUT C
INPUT 8
INPUT 7
INPUT 6
Option 2
47
-------------------------
INPUT 5
Option 1
46
-------------------------
INPUT 4
External Reset
45
-------------------------
INPUT 3
Emergency Restart
44
-------------------------
INPUT 2
Setpoint Access
43
-------------------------
INPUT
1
CTs
Ia (1A)
2
-------------------------
I
+
Ia COM
3
-------------------------
I
-
VTs**
V
+
V
-