Monitoring relay for effective power monitoring in 1- and 3-phase networks of 0...7.2 kW, underload, overload, window, motor winding temperature, error memory, supply voltage can be selected via power module, 2 PDTs
Requirements pertaining to safety and system availability increase constantly – regardless of the industry. Processes are becoming more and more complex, not only in the mechanical engineering and chemical industry but also in system and automation technology. Demands on power engineering are also constantly on the rise.
Error-free and therefore cost-effective operation can only be achieved through continuous monitoring of important network and system parameters. The electronic monitoring relays of the EMD series are available for various monitoring tasks.
The operating states are indicated using colored LEDs, errors that may occur can be sent to a controller via a floating contact or can shut down a part of the system. Some device versions are equipped with startup and response delays in order to briefly tolerate measured values outside the set monitoring range.
Ambient temperature (operation)
-25 °C ... 55 °C
-25 °C ... 40 °C (corresponds to UL 508)
Ambient temperature (storage/transport)
-25 °C ... 70 °C
Nominal input voltage UN
480 V (3 N ~ 480/277 V)
Input voltage range
0 V AC ... 480 V AC (1(N) ~, single-phase load)
0 V AC ... 480 V AC (3(N) ~, 3-phase load)
Input current range
0.15 A ... 6 A (Range: 0.75 kW and 1.5 kW)
0.3 A ... 12 A (Range: 3 kW and 6 kW)
12 A permanent
Maximum temperature coefficient
≤ 0.02 %/K
Underload, overload, window, winding temperature monitoring
Min. setting range
5 % ... 110 % (of PN)
Max. setting range
10 % ... 120 % (of PN)
Setting range for response delay
0.1 s ... 50 s
Setting range for starting delay
1 s ... 100 s
± 2 % (of scale end value)
≤ 5 % (of scale end value)
± 2 %
Total cold resistance
< 1.5 kΩ
≥ 3.6 kΩ (Relay drops out)
≤ 1.8 kΩ (Relay picks up)
2 floating PDT contacts
Maximum switching voltage
250 V AC (in acc. with IEC 60664-1)
Interrupting rating (ohmic load) max.
750 VA (3 A/250 V AC, module aligned, ≤ 5 mm spacing)
1250 VA (5 A/250 V AC, module not aligned, ≥ 5 mm spacing)
5 A (fast-blow)
Supply voltage range
110 V AC ... 500 V AC (see Power modules)
Mechanical service life
Approx. 2 x 107 cycles
100% operating factor
on standard DIN rail NS 35 in accordance with EN 60715
III, basic insulation (as per EN 50178)
Housing insulation material
Polyamide PA, self-extinguishing
Rated insulation voltage
300 V (According to EN 50178)
UL, USA / Canada
UL applied for
Conductor cross section flexible min.
Conductor cross section flexible max.
Conductor cross section solid min.
Conductor cross section solid max.
Conductor cross section AWG min.
Conductor cross section AWG max.
PDF of Monitoring relay for effective power monitoring in 1- and 3-phase net - PHOENIX CONTACT - EMD-FL-RP-480 - 2900177