Phase-failure relay ЕЛ11М2

Key features:

• Microprocessor control, digital signal processing.
• No adjustment needed.
• Phase-loss monitoring.
• Phase sequence monitoring.
• Phase imbalance monitoring.
• Monitoring of Umin and Umax.
• Neutral-loss monitoring.
• Switch-off delay when the voltage falls below Umin or rises above Umax.
• Hysteresis (reset ratio) on re-closing.
• Input and output states shown by a two-colour LED.
• Fed from the monitored network.
• Two groups of isolated changeover contacts
• DIN-rail mounting, narrow housing (35 mm).
• Voltage, hysteresis and operating-time settings can be changed in software.

Specifications:

• Monitored circuit connection: 3 phases with neutral.
• Rated operating voltage 380/220 V
• Mains frequency, 48–62 Hz
• Upper trip threshold, 264 V
• Lower trip threshold, 165 V
• Hysteresis, 10 V
• Operating delay on Umin, and on phase loss, 1 s
• Operating delay on Umax, and on complete loss of all 3 phases, 0.15 s
• Operating delay on a change of phase sequence, 0.1 s
• Active power consumption, max. 3 W
• Isolation voltage input-to-contact and contact-to-contact, 1000 V
• Overall dimensions, 90×65×35 mm
• Weight, max. 200 g.
• Operating temperature range (−25 … +55) °C
• Voltage operating accuracy, better than ±3 %
• Delay-time accuracy, better than ±5 %
• Climatic category УХЛ
• Protection class IP20
• Mounting method and external terminal connection:
• for DIN-rail mounting; incoming conductors connected via terminal blocks
• The terminals accept external conductors of at least 1.5 mm² cross-section.