EMD-BL-PH-480 - Monitoring relay

2903527

Monitoring relay for monitoring the phase sequence and asymmetry of 3-phase voltages at 208 ... 480 V AC / 120 ... 277 V AC, configurable asymmetry, 1 changeover contact, with screw connection

Safety and system availability requirements are constantly on the increase – across all industries. Processes are becoming more and more complex, not only in machine building and the chemical industry but also in building technology. The demands placed on energy technology are also constantly on the rise.
It is only by continuously monitoring key network and system parameters that error-free and therefore cost-effective operation can be achieved. Electronic monitoring relays from the EMD series are available for a wide range of monitoring tasks so that the consequences of errors can be avoided or kept within limits.
The operating states are signaled via color LEDs and any errors that occur can be sent to a controller via a floating contact or can shut down a section of the system. All device versions are equipped with response delays so that measured values outside the set monitoring range can be briefly tolerated.

Product type Phase monitoring relay
Operating mode 100% operating factor
Mechanical service life 15x 106 cycles
Insulation characteristics
Insulation Basic insulation
Insulation characteristics
Insulation Basic insulation
Overvoltage category III
Pollution degree 2

Service life electrical 1x 105 cycles
Mains type 3-phase
Rated insulation voltage 519 V (Supply circuit)
250 V (Output circuit)
Rated surge voltage 4 kV
Supply
Supply voltage ±10 % (= measuring voltage)
Supply voltage range ±10 % (= measuring voltage)
Nominal power consumption 10 VA ((1 W) at 400 V/50 Hz)
16 VA ((1.5 W) at 480 V/60 Hz)

Input name Measuring input
Measured value AC sine (48 Hz ... 63 Hz)
Nominal input voltage UN 480 V (3~ 208 ... 480 V / 120 ... 277 V)
Frequency range 48 Hz ... 63 Hz
Setting range for response delay 0.1 s ... 10 s
Min setting range of the voltage threshold value 187 V AC
Max. setting range of the voltage threshold value 519 V AC
Function Phase sequence
Phase failure
Asymmetry
Basic accuracy ≤ 5 % (of scale end value)
Setting accuracy ± 5 % (of scale end value)
Repeat accuracy ≤ 2 %
Asymmetry 5 % ... 25% / OFF
Recovery time > 500 ms

Switching
Contact switching type 1 floating changeover contact
Maximum switching voltage 250 V AC (in acc. with IEC 60664-1)
Interrupting rating (ohmic load) max. 1250 VA (5 A / 250 V AC)
Output fuse 5 A (fast-blow)

Connection method Screw connection
Stripping length 8 mm
Conductor cross section rigid 0.5 mm² ... 2.5 mm²
Conductor cross section flexible 0.5 mm² ... 2.5 mm²
Conductor cross section AWG 20 ... 14
Tightening torque 1 Nm ... 1 Nm

Status display Yellow LED
Operating voltage display Green LED
Error indication Red LED

Width 17.5 mm
Height 89.5 mm
Depth 65.5 mm

Color gray (RAL 7042)
Housing insulation material Polyamide PA 6.6, self-extinguishing

Ambient conditions
Degree of protection (Housing) IP40 (Housing)
Degree of protection (Connection terminal blocks) IP20 (Connection terminal blocks)
Ambient temperature (operation) -25 °C ... 55 °C
Ambient temperature (storage/transport) -25 °C ... 70 °C
Climatic class 3K3 (in acc. with EN 60721)
Permissible humidity (operation) 15 % ... 85 %