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5/170 ELECTRICAL INSTALL ATION SOLUTIONS FOR BUILDINGS 2CHC 420 001 C0201

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Protection and safety
E 236 undervoltage monitoring relays

Technical features
US 1 US 2
Rated voltage 250 V AC
5
Rated frequency 48-63 Hz
Measuring range: supply voltage 3N 400/230 V AC (terminals N-L1-L2-L3)
overload capacity 3N 459/265 V AC
Switching capacity device in series (distance < 5 mm): 750 VA (3 A/250 V AC);
device not in series (distance > 5 mm): 1250 VA (5 A/250 V AC)
E 236-US 1 Rated insulation voltage 250 V AC (corresponds with IEC 664-1)
Rated surge voltage 4 kV
Tripping delay ca. 100 ms
Clearence and creepage distance > 6 mm (between contact and electronics)
Mechanical service life 20 x 106 operations
Electrical service life at 10000 VA 2 x 105 operations
Max. switching rate max. 6/min (1000 VA Ohmic load);
max. 60/min (100 VA Ohmic load)
Ambient temperature -25 °C/-13 °F to +55 °C/131 °F
Overvoltage category III
Accuracy in non- setting tolerance (US 2) ≤ 5 %
changing repeat accuracy ±1 %
E 236-US 2 environment:
temperature effect ≤ 0.1 %/°C
Max terminals cross-section 4 mm 2
Specifications VDE 0110 and VDE 0435
EMC tests EM 50081-1 and EN 50082-2
Displays LED green= supply voltage applied; LED yellow= relay status
Power loss 1.7 W

E 236 undervoltage monitoring relays
Function
The green LED is lit when the supply voltage is applied. If each phase voltage exceeds 195
V (US1) or exceeds the preset threshold value (US2) with respect to the neutral including the
hysteresis when switching the device on, the relay switches immediately into the working
position. The yellow LED is lit. If at least one phase voltage falls below the threshold value,
the relay goes back into its normal position and the yellow LED goes out.
If also phase 2 fails, the green LED goes out, too.
It is indispensable to connect the neutral conductor!

Application - devices with 2CO contacts
For the control of three-phase undervoltage (each phase to neutral) of switchgear, also for
installations according to DIN VDE 0100-718 (power installations in hospitals and rooms
used for medical purposes outside of hospitals) and DIN VDE 0108-100 (power installations
and safety supply in buildings where many people gather).
US 1: 3 phases to neutral with fixed threshold at 195 V; hysteresis fixed 5 %
US 2: 3 phases to neutral with fixed threshold at 160 – 240 V; hysteresis fixed 5 %

Contact Bbn Order details Price Weight Pack
4016779 1 1 piece unit
piece
EAN Type code Order code kg pc.
2CO 511087 E 236-US 1 2CDE165000R2001 0.095 5
2CO 511094 E 236-US 2 2CDE165010R2001 0.095 5