Function:

38

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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.

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.

Paralleling Relays

PRODUCT SPECIFICATIONS

Part Number

Sensing Voltage ...................................

Control Voltage ....................................

Voltage Differential Adjust Range .......

Phase Angle Adjust Range ..................

Frequency Differential Adjust Range

Operating Temperature ........................

Contact Ratings ....................................

Output Contacts ...................................

WSYN Series

Single Phase, see Part Number Selection

See Part Number Selection

4% to 10% of nominal voltage

4 to 10 electrical degrees

0.2 Hz to 0.5 Hz

5 amp resistive at 120 VAC or 28Vdc

One set N.O., one set N.C.

Sample Part No.

WSYN-50-120-12DC-A

Type:

WSYN - Synchro Check

Frequency Hz

50

60

400

Sensing Voltage VAC (

±10%)

120

400

200

416

208

440

220

460

230

480

240

525

380

575

Control Voltage (

±20%)

12DC

120AC

24DC

230AC

48DC

380AC

125DC

460AC

Options

A = two normal open contacts

B = two normally closed contacts

H = Contacts rated 3 amp at 125 VDC

P = Transient Protection

momentary voltage surges of twice the nominal rated input

voltage (standard).

PART NUMBER SELECTION

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.

13

4 MTG. HOLES

TERMINAL STRIPS

#6 - 32 SCREWS

4

1

5

25

WILMAR™ Protective Relays – WSYN Series