7PV datasheet(77/114 Pages) ETC2

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Monitoring Relays

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Siemens LV 1 T · 2006

3UG Monitoring Relays for Electrical and Additional Measurements

Power factor monitoring

Currents > 10 A only with current transformer.

■Dimensional drawings

3UG30 14

■Schematics

3UG30 14

Three-phase operation, I < 10 A~

3UG30 14

Three-phase operation, I > 10 A~

3UG30 14

Single-phase operation, 230 V~

Rated control supply voltage Us

see Catalog LV 1 (L1/L2 also used to supply units)

Voltage tolerance

0.85 ... 1.15 x Us

Maximum power consumption

Frequency of the monitored line

50 ... 60

Setting range of power factor

0.1 ... 0.99 for lower and upper threshold

Hysteresis fixed

10 for power factor 0.4

10 ... 30 for power factor 0.4

Setting accuracy

10 referred to upper limit of effective range

Repeat accuracy at constant parameters

0.8

Deviations for temperature fluctuations

0.05/K

Delay time

T2, ON-delay

0.5 ... 20;

20 %

T1 after reaching the threshold

0.3 ... 3;

20 %

Input circuit current range

0.5 ... 10

Input circuit peak current (< 1 s)

Input circuit input resistor L1/L2/L3

Input circuit input resistor current IN1

0.02

100

NSB01130b

L2 L3

IN1

< p. f.

> p. f.

> p. f. <

NSB0_01131c

IN1

K(P ) L(P )

k(S ) l(S )

> p. f. <

< p. f.

> p. f.

external current

transformer

NSB01132b

L2 L3

< p. f.

> p. f.

> p. f. <

IN1

Load

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