Monitoring relays
21Pages

MONITORING RELAYS TECHNICAL CATALOGUE

The company ELKO EP has been one of the leading European players in the field of residential and industrial electrical devices for more than 24 years. Since 2007, the company has been developing and producing its own system of Smart Home & Building Solutions called iNELS. EXPORT ANNUAL TURNOVER BRANCHES OVER THE WORLD EXPORTING COUNTRIES iNELS INSTALLATION At present, ELKO EP employs nearly 240 people, exports to 70 countries around the world and already has 13 foreign branches. The company is justly proud to produce it´s own components, and to have its own development and innovation of new...

NEW RANGE with new solution Product Lines ELKO EP RELAYS - Modular electronic devices A wide range of electronic modular devices, which bring new possibilities to home and office control, monitoring and security, as well as to industrial process control: time relays, installation contactors, staircase automatic switches, time switches clocks, dimmers, thermostats, power supplies units, control and signalling devices,GSM gates, etc. iNELS RF Control - Wireless control A unique wireless control system providing you perfect control over your home! The RF Control system enables you to control...

Catalogue content Product identification - explanation

Overview of monitoring relays Voltage monitoring relays - single-phase Under voltage monitoring relays Over voltage monitoring relays Under and over voltage monitoring relays Synchro-check monitoring relays DC Low voltage monitoring relays Voltage monitoring relays - three-phase Under voltage monitoring relays Over voltage monitoring relays Under and over voltage monitoring relays Under voltage monitoring relays Over voltage monitoring relays Under and over voltage monitoring relays Failure and phase sequence monitoring relays Failure and phase sequence monitoring relays Phase balance and...

VROU1-28 | Under and over voltage monitoring relays • These units monitor a single phase supply and operate relays if the phase voltage goes below or above set levels. Front panel controls allow selection of: • Under- and Over-voltage trip levels, • nominal rated voltage, • differential voltage for operating hysteresis and • time delay before a trip triggers a relay response. • LEDs indicate power on and trip status. A relay with two changeover volt-free contacts is fitted. • These instructions contain important safety information. Please read them thoroughly before commissioning, operating...

VRU1-18, VRO1-18 | Voltage monitoring relays • These units monitor a single phase supply and operate relays if the phase voltage goes below or above set levels. Front panel controls allow selection of: • Under (VRU1-18)- and Over- (VRO1-18) voltage trip levels, • nominal rated voltage, • differential voltage for operating hysteresis and • time delay before a trip triggers a relay response. The time delay and differential trip levels help to prevent relay chatter as the monitored voltage level varies. As the relays have changeover contacts, the relay outputs can be inverted by wiring to the...

VRSC1-28 | Synchro-check monitoring relays • This unit compares the voltage, frequency and phase angle of two supplies and operates a relay according to the synchronicity of the supplies. If the two supplies cease to match, the relay operates to provide a control output. The relay output can be used for alarm or control purposes. • These units monitor a voltage of 50, 75 or 150 mV, e.g. from a standard current shunt, and operates one of two relays if the voltage goes above or below set levels. Front panel controls allow selection of: • under- and over-voltage trip levels Umax, Umin •...

VROU3-28 | Under and over voltage monitoring relays VRU3-18, VRU3-28 | Under voltage monitoring relays • These units monitor a 3-phase 3-wire supply and operate relays if a phase-phase voltage goes below or above set levels. Front panel controls allow selection of: • Under- and Over-voltage trip levels, • nominal rated voltage, • differential voltage for operating hysteresis and • time delay before a trip triggers a relay response. • These units monitor a 3-phase 3-wire supply and operate relays if a phase-phase voltage goes below set levels. Front panel controls allow selection of: • Under...

VRO3-18, VRO3-28 | Over voltage monitoring relays VROU3N-28 | Under and over voltage monitoring relays 19 • These units monitor a 3-phase 3-wire supply and operate relays if a phase-phase voltage goes below set levels. Front panel controls allow selection of: • Over voltage trip levels, • nominal rated voltage, • differential voltage for operating hysteresis and • time delay before a trip triggers a relay response. • LEDs indicate power on and trip status. A relay with two changeover volt-free contacts is fitted. • These instructions contain important safety information. Please read them...

VRU3N-18, VRU3N-28 | Under voltage monitoring relays VRO3N-18, VRO3N-28 | Overvoltage monitoring relays 21 • These units monitor a 3-phase 4-wire supply and operate relays if a phase-neutral voltage goes below set levels. Front panel controls allow selection of: • Under voltage trip levels, • nominal rated voltage, • differential voltage for operating hysteresis and • time delay before a trip triggers a relay response. • LEDs indicate power on and trip status. A relay with two changeover volt-free contacts is fitted. • These instructions contain important safety information. Please...

VRSF3, VRSF3N | Failure and phase sequence monitoring relays VRSF3, VRSF3N | Failure and phase sequence monitoring relays • This unit monitors the voltage levels and phase sequence of a threephase supply and operates a relay if any phase voltage goes below a set level or if the phase sequence (L1, L2, L3) is incorrect. A front panel control allows selection of minimum voltage level. LEDs indicate power on and trip status. • Versions are available to suit 3-wire, 3ph (VRSF3) and 4-wire, 3ph+N (VRSF3N) supplies of 110V, 220V and 430V nominal. The 110V and 230V versions occupy a single module...