Datasheet

ManualsBrandsSelectron ManualsMonitoring RelaysVoltage Monitoring Relay

ESG 6.14

Indicators

Red LED ON/OFF: indication of failure of the

corresponding threshold

Red LED flashes: indication of tripping delay

of the corresponding threshold

Yellow LED ON/OFF: indication of relay output

Time ranges

Start-up suppression time: -

Tripping delay: Adjustment range 0.1 ... 10 s

3-phase voltage monitoring relay (Multifunction)

EMR DU21C1, EMR DU21D1, EMR DU21B1

Functions

Voltage monitoring in 3-phase mains with adjustable thresholds,

adjustable tripping delay, monitoring of phase sequence and phase

failure, monitoring of asymmetry with adjustable threshold and the

following functions (selectable by means of rotary switch)

- Undervoltage monitoring

- Undervoltage monitoring and monitoring of phase sequence

- Monitoring of window between Min and Max

- Monitoring the window between Min and Max and monitoring

of phase sequence.

• Voltage monitoring in 3-phase mains

• Measuring range 66...115 / 132...230 / 230...400 Vac 3Ph

• Multifunction

• Monitoring of phase sequence and phase failure

• Additional asymmetry monitoring

• Connection of neutral wire optional

• 2 changers

Reference data

Selectron

EMR Article no.

DU21D1 230 ... 400 Vac 3Ph 41230002

DU21C1 132 ... 230 Vac 3Ph 41230003

(Order data see chapter 1)

Connecting voltages

24 ... 240 Vac/dc, Terminals A1-A2 (galvanically separated)

Tolerance: 24 ... 240 Vdc, -20% ... +25% (galvanically separated)

24 ... 240 Vac, -15% ... +10% (galvanically separated)

100% duration of operation

Output relay

2 potential free change-over contacts

Rated voltage: 250 Vac

Switching capacity (distance <5 mm): 750 VA (3 A / 250 Vac)

Switching capacity (distance >5 mm): 1250 VA (5 A / 250 Vac)

Fusing: 5A fast acting

EMR DU21D1EMR DU21C1

Summary of content (6 pages)

PAGE 1
3-phase voltage monitoring relay (Multifunction) EMR DU21C1, EMR DU21D1, EMR DU21B1 • Voltage monitoring in 3-phase mains • Measuring range 66...115 / 132...230 / 230...
PAGE 2
3-phase voltage monitoring relay (Multifunction) EMR DU21C1, EMR DU21D1, EMR DU21B1 Technical data Nominal consumption Nominal frequency Wave form for ac Ripple at dc Drop-out voltage Base accuracy Adjustment accuracy Repetition accuracy Temperature influence Recovery time Measuring circuit: Fusing Measured variable Input: 3(N) ~132/230 V 3(N) ~230/400 V 3(N) ~ 66/115 V Overload capacity: 3(N) ~132/230 V 3(N) ~230/400 V 3(N) ~ 66/115 V Input resistance: 3(N) ~132/230 V 3(N) ~230/400 V 3(N) ~ 66/115 V Swit
PAGE 3
-phase voltage monitoring relay (Multifunction) EMR DU21C1, EMR DU21D1, EMR DU21B1 Function description For all the functions the LEDs MIN and MAX are flashing alternating, when the minimum value for the measured voltage was chosen to be greater than the maximum value. If a failure already exists when the device is activated, the output relays remain in off-position and the LED for the corresponding threshold is illuminated.
PAGE 4
3-phase voltage monitoring relay (Multifunction) EMR DU21C1, EMR DU21D1, EMR DU21B1 L1 Shift of the star-point (asymmetry) through unequal phase-load with missing neutral wire N L3 L2 If the neutral wire is connected to the device, the asymmetry of the phase voltages referred to the neutral wire (Y-voltage) is monitored also.
PAGE 5
Technical safety advice This manual contains the information necessary for the correct utilisation of the products described therein.
PAGE 6
Prescriptions and standards Mechanical data Housings in self-extinguishing plastic material. Protection mode IP 40 Mounting: snapping mode: Fixing on profile rail according DIN 46277/3 (EN 50 022) Connection via contact protected terminals up to 4 mm2, protecting mode IP 20 Environmental conditions Admissible environmental temperatures from -25 ºC ... +55 ºC (corresponds IEC 68-1) Storage and transport temperature from -25 ºC ...