Function:

27

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Close Differential Relays are voltage sensitive. The

pick-up and drop-out voltage settings are indepen-

dently adjustable, which allows precise setting of the

differential voltage. This relay is available in a wide

range of AC voltages.

Their primary application is

the sensing and control of transfer switches.

Operation:

The output contacts will close when the voltage of

all three phases is above the pre-set pick-up point,

and will open when any one phase drops below its

drop-out setting.

Voltage Sensitive Relays

PRODUCT SPECIFICATIONS

Sample Part No.

D101X

Model: L-L Volts

D101X = 120 VAC

D101-6X = 208 VAC

D101-4X = 240 VAC

D101-10X = 380 VAC

D101-7X = 480 VAC

Notes:

1.

Remove screws for access to pick-up and drop-out

trip adjustments.

2.

Clockwise rotation of the pick-up and drop-out

adjustment will raise the voltage trip point.

Consult factory for additional models.

PART NUMBER SELECTION

Part Number

Nominal Voltage ...............................

Nominal Frequency ..........................

Pick-Up Adjustment Range .............

Drop-Out Adjustment Range ...........

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

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

Operating Temperature Range ........

D101X

AC, Three Phase, see part number selection

50 to 500 Hz.

66-100% of nominal voltage, screwdriver adjustable

66-100% of nominal voltage, screwdriver adjustable

SPNO

5 amp resistive at 120 VAC or 28 VDC

-20

°C to +85°C

13

4 MTG. HOLES

H1

H2

#6 - 32 STUDS

10 PLACES

4.0

5.0

Model

Power Consumption

Each Phase

H1

(inches)

H2

(inches)

D101X

D101-4X

D101-6X

D101-7X

D101-10X

2 VA max.

3 VA max.

3 VA max.

4 VA max.

4 VA max.

2

3 1/2

3 1/2

3 1/2

3 1/2

2 11/16

4 3/16

4 3/16

4 3/16

4 3/16

WILMAR™ Protective Relays – D101X Series,

3 Phase Adjustable, Close Differential