Measuring 18″H x 18″W x 8″D and weighing less than 67 lbs., the Jennings RP173 three-phase vacuum contactor is built tough to work in a variety of heavy-duty applications. Able to withstand the frequent switching required to control furnaces and large motors, this contactor can also be used to switch power transformers and capacitor banks for voltage regulation and power factor correction as a means of reducing operating costs. It is ideal for use in motor controllers that operate production and processing equipment, mining and petroleum equipment, earth movers and conveyors, power shovels and all types of industrial loads. Using a trio of Jennings vacuum interrupters, the three-phase unit provides a short contact-to-contact gap required to interrupt the circuit for highly reliable operation. The contact materials are rated for 7.2 kV, 600 A load life and 6000 A fault current.

Features RP173

  • Sealed main contacts provide a minimum of 1 million maintenance-free open and close operations
  • Reliable operation in harsh temperature extremes ranging from -20 °C to 70 °C
  • Versatility for use with heavy-duty motors, power equipment and motor controllers

Specifications RP173

Voltage ratings
Maximum three-phase line ( kV)1.5, 2.5, 5.0, 7.2
Dielectrics 50/60/400 Hz, 60-second withstand
- Line-to-ground (kV RMS)30
- Line-to-line (kV RMS)30
- Across open contacts (kV RMS)30
BIL, 1.2x50 µsec impulse
- Line-to-ground peak (kV)20
- Line-to-line peak (kV)20
Current rating
Continuous (amps RMS)450/600
Load-switching (amps RMS)450
- Capacitors (grounded neutral)2000 kVAR at 4.16 kV
- Motors5000 HP at 7.2 kV
- Transformers5000 kVA at 7.2 kV
Making current (random make)
- 100 times at 7.2 kV with 3-second back-up (kA RMS)4.5
- 10 times at 7.2 kV with current-limiting fuse (kA)55 peak
- 100 times at 5.0 kV with 3-second back-up (kA RMS)6
Minimum load life at 600 A RMS1 million open/close operations
Interrupt (amps RMS at 5.0 kV)6000
Control voltage
- RP173-2310-XX115 VAC, 50/60 Hz or 110 VDC
- RP173-2311-XX230 VAC, 50/60 Hz or 220 VDC
Control current3.3 pull-in amps, 0.5 hold-in amps
Auxiliary contacts configuration2 N/C, 3 N/O, SPST, double break, 10 amps resistive at 600 VAC
Weight (lb.)67 max.
Release time (msec.) from control switch off to separation of main contacts100 max.
MountingOperates in any position

RP173 three-phase vacuum contactors

Cat. No.Mounting optionActuator voltsLine-to-line voltage (RMS)
RP173-2310-00Standard115 VAC / 110 VDC7200
RP173-2310-01*Standard115 VAC / 110 VDC7200
RP173-2311-00Standard230 VAC / 220 VDC7200
RP173-2315-00**View A-A 180°115 VAC / 110 VDC7200
RP173-2341-00Standard115 VAC / 110 or 120 VDC7200

* Includes rugged frame
** Modified for slower release time


Illustration 1 - RP173

View A-A
Illustration 2 - RP173

Illustration 3 - RP173   Illustration 4 - RP173