XM1 Motor protection

Product detail

Product code:
XM1
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Product Information

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Documentation (Brochures & Manuals)

The XM1 relay of the easy PROFESSIONAL LINE is a digital relay for electrical motor protection. Besides its standard applications, the XM1 is mainly used for motors where normal CBs do not guarantee sufficient protection.

XM1 Connection with 3 phase CTs
Connection with 3 phase CTs, clockwise rotating field (L1‑L2‑L3), ensure correct phase sequence!

XM1 Connection with 2 phase CTs
Connection example with 2 phase CTs and 1 core balance CT

Protection Settings

Parameter Setting Range
I> used for Thermal Replica
I>> 10⋅I B
t6x 0 … 30 s
I B 0.6 … 1.2 I n
I E> 10% I n … 50% I n
I < 40% I B … 80% I B
Unbalanced Load I 2> fixed to I Motor > 20% I B
(Tripping delay: see manual.)
Locked Rotor I > fixed to 350% I B
(Tripping delay = 1 s.)
Cooling-down constant fixed as follows:
1× warming-up time constant quantity after overload alarm;
0.5× warming-up time constant quantity without alarm

Auxiliary Voltage

Voltage supply via wide-range power supply unit:

Auxiliary voltage range

19 … 390 V DC or

36 … 275 V AC

Power consumption

approx. 4 W

Benefits of the Professional Line

  • Fast DIN rail mounting    easy and fast mounting
  • Sealable plastic covers    safe (see if anybody has broken the seal)
  • Super easy settings via front buttons    fast without computer
  • LED and output relays fault indication    easy to find out what has happened
  • Compact form factor    fits in small spaces
  • IT security    no way to attack via Ethernet
  • Robust and reliable    well proven reliable quality
  • Wide Range Power Supply    don’t worry about available supply voltage
  • Integrated Self-Test Procedure (via button)    fast and easy checks: relays, LEDs
  • For all relays except XD1-G and except XRI...: optional interface adapter XRS1 (order code XRS1A or XRS1*);

    for all XRI... [except XD1-G]: optional adapter RS485 to USB (order code RSC2485USB1):

      easy doing high precision settings via Windows ® PC software »Smart view«


Application

  • Start Cycle Supervision

  • Overload

  • Jam / Locked Rotor

  • Underload

  • Unbalanced Load

  • Number of Starts, Counters,…

  • Keeping motor load under the Thermal Damage Curve

Inputs and Outputs
Current transformer inputs 3
Output relays 2
Watchdog relay 1
Protection ANSI
Time overcurrent protection 50/51
Earth fault protection 50N/51N
Negative sequence protection 46
Motor protection: locked rotor 51
Motor protection: undercurrent 37
Motor protection: thermal protection 49
Mounting Type
Housing suitable for DIN rail mounting

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