Relays.
CURRENT BALANCE RELAY:
Range of setting75 +/- 45 o Amps
Operating Time1.6 milli sec
CURRENT BALANCE AUXILLIARY RELAY:
Elec Spec853211
Resistance at 20 o C775 Ohms
Contract Pressure250 +/- 50 gms
Over stroke2 mm
Single element overload relay Type M5021STR20B2 for compressor and Type M5021STR19B2 for Motor Generator
TRIP COIL:
Elec Spec850018
Resistance at 20 o C0.0422 Ohm
HOLD COIL:
Elec Spec851015
Resistance at 20 o C299 Ohm
RESET COIL:
Elec Spec851023
Resistance at 20 o C193 Ohms
Calibration14-18-22 amps
Set at22 amps
TEST:
- With 25 volt across the hold coil and 32.5 amps passing through the trip coil, the overload element must not trip.
- Reverse Polarity of the hold coil and (repeat 1.)
MOTOR GENERATOR
TRIP COIL:
Elec Spec850018
Resistance at 20 o C0.0422 Ohm
HOLD COIL:
Elec Spec851015
Resistance at 20 o C2990 Ohm
RESET COIL:
Elec Spec851023
Resistance at 20 o C193 Ohm
Calibration18-32-46 amps
Set at46 amps
TEST:
- With 25 volt across the hold coil and 65 amps passing through the overload trip coil, the overload element must not trip
- Reverse polarity of the hold coil and (repeat 1.)
H.T INDICATING RELAY TYPE RL 641 A – F 12 M:
Contact type3 +/- 1 mm
WipeAbout 1 mm
Overstroke2 mm
Elec spec853222
Elec Spec851023
Resistance at 20 o C2299 Ohm
TRIP COIL:
½ turn of 10 mm x 20 mm
Reset coil
Elec spec851023
Resistance at 20 o C193 Ohm
Calibration700-900-1100 amps
Set at900 amps
TEST:
1.Relay should reset with 55 volt on the reset coil
CURENT LIMIT RELAY TYPE RL 320A – CB – M
Contact Wipe0.5 mm (approximately)
Contact Gap3 +/- 1 mm
Contact Over travel2 mm
Contact pressure50 +/- 10 gms
SHUNT COILS:
Elec Spec853212
Resistance at 20 o CWinding c-d 247 Ohms
Winding a-b 237 Ohms
ADJUSTMENT:
- With the series coils only in circuit the calibration spring should adjusted so that the moving contacts touch the fixed contact Fingers at 365 amps, passing through the series coils.
- With 110 V DC applied to the shunt coil, circuit between wires 301 & 311 (positive to 301) the resistor between wires 302 & 311 should be adjusted until the moving contact touch the fixed contact fingers at 490 amps, passing through the series coils.
- With 110 V DC applied to shunt coils circuits between wires 301 & TC6 (positive to 301), the resistor between wires 311 & T6 should be adjusted unit; the moving contact touch the Fixed contact fingers at 480 amps, passing through the series coils.
No current relay Type 28EB
SERIES COIL – 6 TURNS OF 8 MM X 32 MM COPPER STRAP:
PICKUP COIL:
Elec Spec853013
Resistance at 20 o C449 Ohm
Dropout current (series coil)5 amps
TIME DELAY RELAY TYPE 28ER8:
Elec Spec800242
Resistance at 20 o C364 Ohm
Time delay1.5 to 3.5 seconds
EMERGENCY LIGHTS RELAY TYPE M18ER5:
OPERATING COIL:
Elec Spec851131
Resistance at 20 o C957 Ohm
L.T. INDICATION RELAY/ INCREASE ACCELERATION RELAY:
RELAY TYPE RL 789A-110
Contact gap2 to 2.5 mm
Contact pressure30 +/- 10 gms
OverstrokeAbout 2 mm
Elec Spec853219
Resistance at 20 o C1030 Ohm
MAGNETIC COIL (UPPER):
Elec Spec853217
Resistance at 20 o C230 Ohm
MAGNETIC COIL (LOWER):
Elec Spec853216
Resistance at 20 o C118 Ohm
Contact gap2.5 +/- 0.5 mm
Contact pressure200 +/- 50 gms
OVER VOLTAGE RELAY TYPE RL424A1-M:
TRIP COIL (UPPER)
Elec Spec853218
Resistance at 20 o C88 Ohm
Pick up voltage of Trip Coil120 to 125 volts
(With the resistor in series with the trip coil)
MAGNETIC COIL (LOWER):
Elec Spec8532216
Resistance at 20 o C118 Ohm
Contact gap2.5 +/- 0.5 mm
Contact pressure200 +/- 50 gms
MASTER CONTROLLER TYPE M26MC7:
Contact gap2.54 to 3.2 mm
Finger pressure280 to 400 gms
(Measured at the contact with finger closed)
CONTROL CUTOUT SWITCH TYPE M14MS10A1:
Contact gap3.2 mm
Contact pressure170 gms/min
Cam to roller gap0.8 mm
(When fingers are making contact)
PANTOGRAPH OPERATING VALVE TYPE M5015PV2:
OPERATING COIL:
Elec Spec853007
Resistance at 20 o C29.9 Ohm
Double pole latched contactor type M8EC4-lights
OPERATING COIL:
Elec Spec851019
Resistance at 20 o C102 Ohm
TRIP COIL:
Elec Spec851016
Resistance at 20 o C105 Ohm
Right hand blow out coil (Main lights)
Four turns of 3.048 x 15.9 mm copper strap
LEFT HAND BLOW OUT COIL (EMERGENCY LIGHTS):
Elec Spec850004
Resistance at 20 o C0.0122 Ohm
Minimum pick up65 volts
Contact pressure0.9 to 1.8 kg
Double pole latched contactor type M8EC5-fans
OPERATING COIL:
Elec Spec851019
Resistance at 20 o C102 Ohm
TRIP COIL:
Elec Spec851016
Resistance at 20 o C105 Ohm
BLOW OUT COILS:
Elec Spec850004
Resistance at 20 o C0.0122 Ohm
Minimum pick up65 volts
Contact pressure0.9 to 1.8 kg
E.M. CONTACTOR FOR AUXILLIARY COMPRESSOR:
BLOW OUT COIL:
Elec Spec850134
Resistance at 20 o C0.01648 Ohm
OPERATING COIL:
Elec Spec851107
Resistance at 20 o C1122 Ohm
R.R. RESISTOR:
Main ResistorWeak Field Resistor
SectionCold Ohm at 20 o CSectionCold Ohm at 20 o C
M16 – M17 2.24M.G. Protective9.7
M12 – M130.418Resistor MG 3 -
M13 – M140.335MG4
M14 – M150.280Compressor19.4
M15 – M160.234Protective
M17 – M180.202Resistor C4 – M32
M19 – M210.418
M21 – M220.335
M22 – M230.280
M23 – M240.234
Battery charging resistor:
0.415 Ohm set at 0.3 Ohm