EMD-BL-PTC - Monitoring relay

2906252

Temperature monitoring of the motor winding (maximum 6 PTCs) for temperature sensors according to DIN 44081 and DIN 44082 with short-circuit monitoring of the thermistor circuit, 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 Temperature monitoring relay
Operating mode 100% operating factor
Mechanical service life 15x 106 cycles
Insulation characteristics
Overvoltage category III
Pollution degree 2

Service life electrical 1x 105 cycles
Rated surge voltage 4 kV
Supply
Supply voltage 230 V AC (-15 % ... +10 %)
Supply voltage range 195.5 V AC ... 253 V AC
Nominal power consumption 3.5 VA (0.5 W)

Input name Measuring input
Maximum input voltage 4 V DC (connection terminal blocks: T1 and T2)
Frequency range 50 Hz ... 60 Hz
Maximum temperature coefficient < 0.05 %/K
Response delay < 100 ms
Switch-on delay < 450 ms
Response value ≥ 3.6 kΩ (Relay drops out)
Function Winding temperature monitoring
Basic accuracy ± 10 % (of scale end value)
Total cold resistance ≤ 1.5 kΩ
Release value ≤ 1.6 kΩ (Relay picks up)
Short-circuit detection < 20 Ω
Recovery time > 300 ms
Control
Reset Autoreset

Switching
Contact switching type 1 floating changeover contact
Maximum switching voltage 250 V AC (in acc. with IEC 60947-5-1)
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

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
Permissible humidity (operation) 15 % ... 85 %

CE
Certificate CE-compliant

Low Voltage Directive Conformance with Low Voltage Directive
Noise immunity EN 61000-6-2
Electromagnetic compatibility Conformance with EMC directive
Noise emission EN 61000-6-3