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Power Surge Protector EMS for Over/Under Voltage-Portable 50Amp/240v - 19.4132

Power surger protector EMS-PT50X
Power surger protector EMS-PT50XPower surger protector EMS-PT50XPower surger protector EMS-PT50X, EMS PT30X
Sale Prices Shown are Valid Until 10/29/21.


Power Surge Protector EMS for Over/Under Voltage-Portable 50Amp/240v

Item 19.4132 | MFR# EMS-PT50X

This product provides total electrical protection of RV electronics and complete digital readout of the AC power source. 

RV electrical protection guards against high/low voltage problems, incorrect AC wiring, and power surges.  The built in display continually scrolls, showing line voltage, current, frequency, and error messages. 

High/Low Voltage Protection

Whenever A/C power falls below 104 volts, or rises above 132 volts, the EMS automatically shuts down power to the RV. The EMS will monitor the power and once the AC power rises above 104 volts, or below the 132-volt level, the time delay indicator flashes for the present time and then automatically restores power to the RV.  

Time Delay for A/C Compressor

If the AC power is interrupted, or the EMS detects a fault condition, the built-in time delay is activated. There are two settings on the EMS: one is a 136-seconds (02:16) time delay and the other is 15 seconds. Consult your air conditioner manual to see if it has a time delay built in. If so, use the 15 second delay, if not; use the 136-second delay. The factory setting is 15 seconds. 

 3-Mode Surge Protection (LCHW30 model):

This feature provides full surge protection L-N, L-G and N-G. Total Joule rating is 1,790, 44,00A surge current. Response time of <1 Nano second.

 Accidental 240V Protection

If 240 volts is detected when plugging in AC power, the EMS will NOT allow power to the RV. If this condition occurs while power is applied to the RV, the EMS shuts off power instantly. This display will read the voltage and E-3 for the error. (NEVER BYPASS THE EMS WHEN THIS OCCURS.)

 Which protection is right for you?  View Progressive Industries recommendation for your RV type. 


  • Over/Under Voltage Protection
  • Open Ground, Open Neutral & Reverse Polarity Detection & Protection
  • Mis wired Pedestal Indication
  • Surge Failure & Current Indication
  • Adjustable Time Delay
  • High & Low Voltage Protection (Low<104, High>132)
  • Frequency Protection (Low<5Hz, High>69Hz) 
  • 5 mode surge protection
  • Security Locking Bracket
  • 6 "W x 18 "H x 6 1/8"D

Ems Hardwire 30a/240v Pro
Item #: 55-2751 | Manufacturer #: EMS-HW30C
Product Details
Sale Prices Shown are Valid Until 10/29/21.
Power Surge Protector For Over/Under Voltage-Portable 30Amp/120v
Item #: 19.4131 | Manufacturer #: EMS-PT30X
Product Details
Sale Prices Shown are Valid Until 10/29/21.

More Details EXPAND

Manufacturer Numbers
EMS-PT50X, 19-4132
Progressive Industries
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