Manual Relé DP-25 (Union Switch & Signal Inc.)

8/16/2019 Manual Relé DP-25 (Union Switch & Signal Inc.)

1/7

SERVICE MANUAL 2378J

DP 25 POLARIZED RELAY

Without Magnetic Blowout Contacts

For Low Voltage Switch Movement Control

THIS M NU L

IS

NOW OBSOLETE


2/7


3/7

DP-25 POLARIZED

RELAYS

WITHOUT MAGNETIC

BLOWOUT

CONTACTS

FOR LOW

VOLTAGE

SWITCH MOVEMENT CONTROL

These

relays can also be used

for

control

of 110

volt

25

or

60

cycle C

movements. THIS RELAY IS NOW

OBSOLETE

For DP-25

Relays with

Magnetic Blowout contacts , see Service Manual 2378-K.

**********

This

service

specif icat ion

covers

the

adjustment

and

cal ibrat ion

of

DP-25

Polarized

Relays

for

Low Voltage switch

Movement Control.

These

relays

have

been

furnished

in

two designs:

the original

design and an

improved

eff iciency

design. The improved

eff iciency

design

can

be ident i f ied

by the backstrap,

which

is held by a

clamp

attached to

the

permanent magnet

rather

than by two bolts screwed direc t ly into the

neutral

cores as on the

original design, and also by the

short

(DN-11 type

contact

fingers instead of

the long

(DP-14 type

contact

f ingers that were

used on

the original design.

All

of

the

information given

in

Service Manual 2378 for standard DP-14 relays

applies to these

relays

with the following exceptions:

1. PERMANENT

MAGNET

ND YOKE

-

Per

Service Manual 2378, Section

2,

except that the DP-14 relay charging

out f i t i s not applicable to the DP-25 relay, a special charger

as

shown by

Figure 1

being used

instead.

BACKSTRAP SHOULD BE DR WN AGAINST

MAGNET CHARGER CORE

PERMANENT MAGNET

CORE ASSEMBLED TO

TOP PLATE

CHARGING

COIL

NO GAP HERE


4/7

2. NEUTRAL ARMATURE HOLD DOWN SPRINGS

The

supports

for

the

hold-down

springs

should

be

in

approximate alignment

with

the guide holes in the top pla te

so that

the

springs

are

ent i re ly

free

from the sides of the guide holes in

l l

posi t ions of the armature.

The

springs must

be

seated squarely

on the

supports.

The adjustment

of

the hold-down springs may

be

changed

as necessary

to meet

the

cal ibrat ion

requirements, provided

the pressure

does

not go below a minimum value to

be

checked

as follows.

With

the

relay inverted,

a

pressure or weight specif ied

below

applied

to the

armature t a

point in

l ine

with the safety stop

pin should not move the armature enough to open the back contacts .

Force or weight,

to

check

hold-down

Original Design

7.1

ounces 202

grams)

Improved

Design

8.1

ounces

231 grams)

Both

adjust ing screws

should be

set

approximately the same. After

adjust

ments have

been completed,

the lock nuts should be

securely t ightened.

3. POLAR ARMATURE

Per

Service Specif icat ion 2378, Section 4, except ir gap to be

0.019

inch.

4.

CONTACT ADJUSTMENT

Per

Service

Specif icat ion

2378, Section 5 and 6,

except

the

following:

A.

Front contact Adjustment

The low voltage

front contacts should

be

adjusted

with spacers

tabulated below.

The spacers

used

for

front contact adjustment may

be

changed

as

necessary to

get cal ibrat ion values,

except that spacers smaller than

the minimum speci f ied should not

be

used.

Nominal Spacer

Minimum Spacer

Original

Design

0.019 Inch

0.017 Inch

Improved

Design

0.021

Inch

0.018 Inch


5/7

For

example

when

an 0.019

inch spacer is

used

for the low voltage

contacts

of the

original design an 0.027

inch spacer

should be used

for

the

high

voltage

contacts.

The high voltage front contacts should be

in

l ine when adjusted

and

t ightened

and

should

extend

beyond the carbon on the contact spring

at le s t 1/64 inch on

each side with

the armature end play taken up

on the inspected s ide . With

the

re lay energized the carbon

on the

contact

spring should be approximately centered on the front

contact

carbon.

B. Back

Contacts

Back

contacts should

be adjusted to give

an

O

030

inch maximum back

contact opening

when

the high voltage front contacts of the

original

design

are

jus t made.

On the improved design the back

contacts

should

be adjusted

to give

an

0.050

inch minimum back

contact

opening with

the

armature

in

the

ful ly deenergized

posi t ion.

With

the

relay

deenergized

the

armature back

stop screw should be

t ightened against the armature to give a back

contact

compression of

0.040

inch. This adjustment can

be

obtained

by insert ing

an 0.012

inch spacer for original design

relays

and an

0.020

inch

spacer

for

improved design

relays

between the bottom edge of the armature and

the armature back stop screw and t ightening the back stop screw unti l

the back

contacts jus t

touch.

In

no

case

should

the

high

voltage

contact

opening

be less

than

0.060

inch.

5.

POL R

RM TURE HOLDING

TORQUE

Per

Service

Specificat ion

2378 Section 12

except the polar armature

should require

a force of more

than

200 grams to force t away from the

pole

face of

the

l s t

energized

posi t ion.


6/7

v

w

-.I

CD

I

c

O

.

)

RELAY

RESIS.

IN OHMS

110

1000

RELAY

RESIS.

IN OHMS

44

70

110

)

Table

1.

Calibra t ion

Values

for

DP-25

Polarized Original

Design) Relays

For

Low

Voltage

Switch Movement control

No Extra Contacts (2 L.V. 2 H.V. Neutral and 4N-4R Polar Contacts)

MINIMUM

MAXIMUM

MAXIMUM

CHARGE

MINIMUM DIRECT DIRECT

POLAR ARM.

(4X DPU

RELEASE PICK-UP

PICK-UP REVERSAL

Amps. Volts Amps. Volts Amps. Volts Amps. Volts

Amps.

Volts

.138 15.2 .020

2.2

.0303

3.33 .036 3.96

• 0212

2.32

.048 48.0

.007

7.0

.0105 10.5

.0125

12.5

.0074

7.4

Table 2.

Calibra t ion Values

for DP-25 Polarized Original Design) Relays

For Low

Voltage

Switch Movement

Control

2 Extra Contacts 4 L.V. 2 H.V. Neutral and 4N-4R Polar Contacts)

MINIMUM

MAXIMUM

MAXIMUM

CHARGE

MINIMUM

DIRECT

DIRECT POLAR ARM.

(4X DPU

RELEASE PICK-UP

PICK-UP

REVERSAL

Amps. Volts

Amps.

Volts

Amps. Volts Amps.

Volts Amps.

Volts

.217

9.56

.0333 1.47

.0478

2.10

.0567

2.49

.0333

1.47

.183

12.81

.0269 1.88

•0385 2.70

.0458

3.21

.0269

1.88

.138

15.2

.0212

2.32

.0303

3.33

.036

3.96

.0212

2.32

)

REV. NEUTRAL

ARM.

TO STOP

Amps. Volts

•

050

5.5

.0175

17.5

REV. NEUTRAL

ARM.

TO

STOP

Amps.

Volts

.1244 5.47

.1005

7.04

.079

8.69


7/7

RELAY

RESIS.

IN OHMS

110

280

450

700

1000

RELAY

RESIS.

IN OHMS

N

110

280

.I

CD

450

c

700

d

1000

.

V1

·,

\

Table

3.

Calibra t ion

Values for DP-25 Polar ized

Improved

Design) Relays

For

Low

Voltage

Switch

Movement

control

No Extra

contacts

2 L.V. 2 H.V. Neutral and 4N-4R Polar contacts)

MINIMUM

MAXIMUM

M XIMUM

CHARGE

MINIMUM

DIRECT

DIRECT

POLAR ARM.

(4X DPU RELEASE PICK-UP

PICK-UP REVERSAL

Amps.

• 138

.086

.068

.057

. 048

CHARGE

Volts

Amps. Volts Amps. Volts Amps.

Volts Amps. Volts

15.2 .0188

2.07

.0303 3.33 .0345 3.80 .0212

2.33

24.1 .0117

3.28

.0189

5.29

• 0215 6.02

.0132 3.70

30.6

.0092

4.14 .0149

6.

71

.017

7.65

.0105 4.73

40.0 .0078

5.46 .0125 8.75

.0143

10.0 .0088

6.16

48.0 .0065

6.5

· • 0105

10.5

.012

12.0

.0074

7.4

Table

4.

Calibra t ion Values

for DP-25 Polar ized Improved Design)

Relays

For Low Voltage Switch Movement Control

2

Extra

Contacts (4 L.V. 2 H.V. Neutral and 4N-4R Polar

Contacts)

MINIMUM MAXIMUM

MAXIMUM

MINIMUM

DIRECT

DIRECT POLAR ARM.

REV. NEUTRAL

REV. NEUTRAL

ARM. TO STOP

Amps

•

Volts

.0345

3.80

.0215

6.02

.017

7.65

.0143

10.0

.012

12.0

(4X

DPU

RELEASE PICK-UP PICK-UP

REVERSAL

ARM. TO STOP

Amps.

Volts

Amps.

Volts

Amps.

Volts

Amps. Volts

Amps. Volts

Amps.

vol ts

.138 15.2

.0197

2.17

.0303 3.33

.0345 3.80

.0212

2.33

.0345

3.80

.086 24.1

.0123

3.44

.0189

5.29

.0215 6.02 .0132 3.70

.0215 6.02

.068

30.6

.0097 4.37 .0149 6.71

.017

7.65

.0105

4.73 .017

7 . 65

.057 40.0

.0081

5.67

.0125

8.75

.0143

10 .o ·

.0088

6.16 .0143

10.0

.048 48.0 .0068

6.8

.0105

10.5

.012

12.0

.0074

7.4

.012

12.0

Documents

Manual Relé DP-25 (Union Switch & Signal Inc.)