TR Series by MURPHYMATIC®
Electric Motor ControllersUse in Conjunction with MurphySWICHGAGE® for:Electric Motor Start and StopEmergency Shutdown and Time DelayLow Voltage Control of Magnetic MotorStarters Utilizing a Low 24 Volt Pilot Circuit
DescriptionThe Murphy TR Series, Transformer RelayAssemblies are electric motor controllers.Models are available for emergencyshutdown, start and stop only, start and stopwith emergency shutdown, and combinationsof the above models with time delay.All TR Series internal control circuits arecompletely prewired and relays are plug intype to facilitate field servicing. NEMA 1 enclosure is standard on all TRSeries models. NEMA 3 weatherproofenclosure, “LC” Less Case, and “EX”Explosion proof versions are optional.Murphy SWICHGAGE® instruments forpressure, temperature, level etc., can beused with the TR’s for semiautomatic ortotally unattended operation and control ofyour electric motor powered equipment.
Controls up to 480 VoltsA set of normally open, dry relay contactscontrolled by a 24 VAC relay coil, controlsthe magnetic motor starter holding coil upto 480 volts. The high voltage contacts arecompletely isolated from the low voltagecontrol to help reduce electrical hazards.
FeaturesHeavy-duty transformer with multipleprimary taps for easy connection to mostany available AC power sources.24 VAC low Voltage secondary control circuitwith terminals for remote auxiliary switches.Plug-in relays have three SPDT silver cadmiumoxide contacts providing long life reliability.Power relay has extra heavy silver cadmiumoxide contacts rated 10 amp, 480 VAC.When TR is used with a Murphy AnalogSWICHGAGE®, it allows for visual reading ofoperating conditions, and provides an adjustabledifferential between high and low settingsthroughout the SWICHGAGE® dial range.
ApplicationsThe TR Series transformer relay assembliesare ideal for controlling a variety of electricmotor driven applications. They arerecommended for use on salt water disposalsystems, waterflood systems, and manyothers. A Model TR-1762 used inconjunction with a model OPLHC TankLevel Controller, and an OPLC Seriesdischarge pressure can completely automatea salt water disposal pump.
SpecificationsTransformer: Primary (power supply) with
triple taps for 120/240/480 VAC. 50/60 Hz.Secondary (control supply) 24 VAC. Power Rating: 25 VA.
Terminal Blocks:High Voltage rated at 30 A, 600 V.Low Voltage rated at 20 A, 300 V.
Control Relays:Plug-in, 120 V, 10 A contact rating.
Contacts:Power (holding): 10 A, 480 VAC, SPST.Control (auxiliary): 480 VAC, 690 VA pilot duty.
Conduit:Top: 3/4 in. hub; Bottom 1/2 in. hole.
Approximated Shipping Dimensions:NEMA 1; NEMA 3; and “LC” Less Case:
15 x 15 x 7 in. (381 x 381 x 178 mm).“EX” Explosion proof: 16-1/2 x 16 x 22 in.
(419 x 406 x 559 mm).Approximated Shipping Weight:
NEMA 1: 18 lb. (8.16 kg.).NEMA 3: 22 lb. (10 kg.).“LC” Less Case: 14 lb. (6.35 kg.).“EX” models: 61 lb. (27.66 kg.).
TR-6905BRevised 05-03
Catalog Section 40(00-02-0112)Transformer Relay Assemblies
MurCalCALL MURCAL TO PLACE YOUR ORDER
P:(661)272-4700 F:(661)947-7570www.murcal.com e-mail: [email protected]
TR1760
Models and FunctionsTR7207 — Used for emergency shutdown of electric motors drivenequipment which are manually started.TATTLETALE® indicates shutdown and locks out power until themalfunction is corrected and the TATTLETALE® is reset. A momentary power failure during shutdown will not void the lockoutfeature. For use with standard, normally open, one-wire to groundMurphy SWICHGAGE® instruments.
TR7208 — Same as TR7207 except used with normally closed,ungrounded SWICHGAGE® instruments which open for shutdown.
TR9193 — Same as TR7207 with adjustable time delay, whichlocks out shutdown functions for up to 10 minutes, to allow pressuresand temperatures to reach normal range after start-up.
TR1760 — Used with electric motors or driven equipment which isstarted and stopped from a remote, normally open SWICHGAGE®.
TR1761 — Includes the same features as the TR1760 plusprovisions for operating remote panel lights or audible alarms. Alsoincludes emergency shutdown and lockout from a remote, normallyopen, one wire to ground SWICHGAGE®.
TR1762 — Same as TR1761 with adjustable time delay lockout ofshutdown functions, for up to 10 minutes, during start-up.
NOTE: TR1760, TR1761, and TR1762 comply with NationalElectrical code 1975, Article 430-73.Some models have been discontinued and replaced by othermodels:
Discontinued ReplacementTR-5171................... TR1760TR-7159................... TR1761TR-9195................... TR1762
To Order TR Assemblies Use The Appropriate Model Number
CUSTOMER WIRING
L 1 L 1 L 2
MOTOR
HC
TYPICAL STARTERPANEL HOOK-UP
H ATB-1
(YELLOW)
TB-2(BLUE)
822-PH
K1
CIRCUITBREAKER
TD
NC
COM
NO
480V
240V
120V
COM
NO
COM
K 2
K 3
4
3
2 6 8
71
1
1 2 3 4 5 6 7 8 9 10
8
4 5
2
3 67
2 34 5 67 8 9
A B
1 2 3
4 5 67 8 9
A B
51
109
87
65
43
21
NO
NC
COM
SW
TRANSFORMERYELLOW
RED
WHITE
BLACK
STA
RT
STO
PD
ELAY
EDSH
UTD
OW
N
EMER
GEN
CYSH
UTD
OW
N
HAND–OFF–AUTOSELECTOR SWITCH
TR1762
TR Assemblies
WARNINGBefore beginning installation of this Murphy product:Disconnect ALL electrical power to the machine.Make sure the machine CANNOT operate during installation.Follow all safety warnings of the machine manufacturer.
TR-6905B page 2 of 4
MurCalCALL MURCAL TO PLACE YOUR ORDER
P:(661)272-4700 F:(661)947-7570www.murcal.com e-mail: [email protected]
CUSTOMER WIRING
L 1
MOTOR
HC
TYPICAL STARTERPANEL HOOK-UP
H ATB-1
(YELLOW)
TB-2(BLUE)
HAND–OFF–AUTOSELECTOR SWITCH
822-PH
1 2 3 4
NO
109
87
65
43
21
NC
COM
SW
K1
42 6 8
7513
CIRCUITBREAKER
JUMPER
L 1 L 2 NO
COM
NO
480V
240V
120V
COM
NO
COM
TRANSFORMERYELLOW
RED
WHITE
BLACK
CUSTOMER WIRING
NC
COM
NO
480V
240V
120V
COM
NO
COM
L 1
MOTOR
HC
TYPICAL STARTERPANEL HOOK-UP
H A
TB-1(YELLOW)
TB-2(BLUE)
1 2 3 4
STA
RT
STO
P
HAND–OFF-AUTOSELECTOR SWITCH
TRANSFORMER
K1
K 2
K 3
YELLOW
4
3
2 6 8
7 1 2 34 5 67 8 9A B
1 2 3
4 5 67 8 9A B
51
CIRCUITBREAKER
JUMPER
RED
WHITE
BLACK
L 1 L 2
109
87
65
43
21
TR7207
TR1760
WARNINGBefore beginning installation of this Murphy product:Disconnect ALL electrical power to the machine.Make sure the machine CANNOT operate during installation.Follow all safety warnings of the machine manufacturer.
TR-6905B page 3 of 4
MurCalCALL MURCAL TO PLACE YOUR ORDER
P:(661)272-4700 F:(661)947-7570www.murcal.com e-mail: [email protected]
CUSTOMER WIRING
NC
COM
NO
480V
240V
120V
COM
NO
COM
L 1
MOTOR
HC
TYPICAL STARTERPANEL HOOKUP
H ATB-1
(YELLOW
TB-2(BLUE)
STA
RT
STO
PEM
ERG
ENCY
SHU
TDO
WN
HAND–OFF–AUTOSELECTOR SWITCH
K1
822-PH
CIRCUITBREAKER
JUMPER
L 1 L 2
1 2 3 4 5 6
4
3
2 6 8
751
109
87
65
43
21
K 2
K 3
1 2 3
4 5 67 8 9
A B
1 2 3
4 5 67 8 9
A B
NO
NC
COM
SW
TRANSFORMERYELLOW
RED
WHITE
BLACK
TR1761WARNING
Before beginning installation of this Murphy product:Disconnect ALL electrical power to the machine.Make sure the machine CANNOT operate during installation.Follow all safety warnings of the machine manufacturer.
TR-6905B page 4 of 4
REGISTERED
USA–ISO 9001:2000 FM 28221UK–ISO 9001:2000 FM 29422
Printed in U.S.A. 0888090
WarrantyA limited warranty on materials and workmanship is given with this FW Murphy product.
A copy of the warranty may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm
MurCalCALL MURCAL TO PLACE YOUR ORDER
P:(661)272-4700 F:(661)947-7570www.murcal.com e-mail: [email protected]