Paralleling Relays
Function:
• ANSI/IEEE C37.90-1978
• UL file No. E58048
25
WILMAR™ Protective Relays – WSYN Series
TERMINAL STRIPS
#6 - 32 SCREWS
• CSA file No. LR61158
Operation:
A. The output relay will energize when all three
of the following conditions are met:
1. Voltage differential is below the preset
value.
2. Phase angle is below the preset value.
3. Frequency differential is below the preset
value.
3 1/
2
B. The relay is also provided with a "Double Dead
Bus" feature: When the voltage on either one
of the sensing inputs is below 15-25% of
nominal, (Dead Bus Condition), the output
relay will energize to permit paralleling.
When both sensing voltage are below 15-25%
of nominal, the output relay will not energize.
13
/64
" DIA.
4 MTG. HOLES
Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm.
PART NUMBER SELECTION
Sample Part No.
WSYN-50-120-12DC-A
Type:
WSYN - Synchro Check
Frequency Hz
50
60
PRODUCT SPECIFICATIONS
400
Part Number
WSYN Series
Sensing Voltage VAC ( ±10%)
Sensing Voltage ...................................
Single Phase, see Part Number Selection
120
200
208
220
230
240
380
400
416
440
460
480
525
575
Control Voltage ....................................
Voltage Differential Adjust Range .......
See Part Number Selection
4% to 10% of nominal voltage
Phase Angle Adjust Range ..................
Frequency Differential Adjust Range
Operating Temperature ........................
Contact Ratings ....................................
Output Contacts ...................................
Notes:
1. Remove black cover screws to gain access to the adjustment potentiometers.
2. Clockwise rotation increases the trip differential setting.
3. Calibration terminals (11) (12) must be connected together to disable the phase angle
detector when setting the frequency difference trip point. Once it is set, the connection must
be removed.
4 to 10 electrical degrees
0.2 Hz to 0.5 Hz
Control Voltage ( ±20%)
-20o C to +50 oC
12DC
24DC
120AC
230AC
380AC
460AC
5 amp resistive at 120 VAC or 28Vdc
One set N.O., one set N.C.
48DC
125DC
Options
A = two normal open contacts
B = two normally closed contacts
H = Contacts rated 3 amp at 125 VDC
P = Transient Protection
Transient Protection - All voltage relays will withstand
momentary voltage surges of twice the nominal rated input
voltage (standard).
3 8
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