Siemens EF6 Series Bedienungsanleitung PDF herunterladen (Seite 7)

Screw terminal 1

Spring-loaded terminal

Screw terminal 1

Spring-loaded terminal

Return voltage due to coupling between the individual phases

The 3UG4511 device can not dectect phase failures reliably.

Loads connected to the three-phase line supply – such as motor windings,

lamps, transformers – result in a coupling between the individual phases.

As a result of this coupling, there is always a return voltage at the equip-

ment terminal of the phase that has failed.

Insulation monitoring for IT line supplies

Line supply Measuring range Auto reset/ Contacts Width Auxiliary voltage Order No.

fault memory

AC 1–110 kΩ Selectable 1 CO 45 mm 115/230 V AC 3UG3081-1AK20

24–240 V AC 3UG3081-1AW30

DC 10–110 kΩ Selectable 1 CO 45 mm 24–240 V AC 3UG3082-1AW30

Phase Phase Phase Hysteresis Under- Over- N-conduc- Delay times Contacts

Line supply

Order No.

sequence

failure

imbalance

voltage voltage tor moni- voltage

toring

22.5 mm wide

3UG4614 to 3UG4618 can be digitally set, with fault memory and with LCD display

Yes

Conditional

– – – – – – 1 CO 160–260 3UG4511- AN20

320–500 3UG4511- AP20

420–690 3UG4511- AQ20

2 CO 160–260 3UG4511- BN20

320–500 3UG4511- BP20

420–690 3UG4511- BQ20

Yes Yes

10%

– – – – – 1 CO 160–690 3UG4512- AR20

2 CO 160–690 3UG4512- BR20

Yes Yes 20% 5% 160–690 V – – Off delay 0.1–20 s 2 CO 160–690 3UG4513- BR20

Selectable

Yes 0 or 1–20 V 160–690 V – – On and off 2 CO 160–690 3UG4614- BR20

5–20% delay 0.1–20 s

Selectable

Yes Using 1–20 V 160–690 V 160–690 V – 0.1–20 s for V

min

1CO for V

min

160–690 3UG4615- CR20

threshold and V

max

and V

max

values

Selectable

Yes Using 1–20 V 160–690 V 160–690 V Yes 0.1–20 s for V

min

1 CO for V

min

160–690 3UG4616- CR20

threshold (90–400 and V

max

and V

max

(90–400

values w.r.t. N) w.r.t. N)

Autom. Yes 0 or 1–20 V 160–690 V 160–690 V – Off delay 0.1–20 s 1 CO for line 160–690 3UG4617- CR20

correction 5–20% faults and 1 CO

for phase sequence

Autom. Yes 0 or 1–20 V 160–690 V 160–690 V Yes Off delay 0.1–20 s 1 CO for line 160–690 3UG4618- CR20

correction 5–20% (90–400 faults and 1 CO (90–400

w.r.t. N)

for phase sequence

w.r.t. N)

Measuring range Hysteresis Contacts Delay time Auxiliary voltage Order No.

22.5 mm wide, all of the devices can be digitally set and have an LCD display, a fault memory that can be switched-in,

simultaneous monitoring for overvoltage and undervoltage over the complete measuring range

17–275 V AC/DC 0.1–150 V 1 CO 0–20 s Self-supplied 3UG4633- AL30

0.1–60 V AC/DC 0.1–30 V 1 CO 0–20 s 24 V AC/DC 3UG4631- AA30

24–240 V AC/DC 3UG4631- AW30

10–600 V AC/DC 0.1–300 V 1 CO 0–20 s 24 V AC/DC 3UG4632- AA30

24–240 V AC/DC 3UG4632- AW30

Single-phase voltage monitoring

3UG4 monitoring relays for line supply and three-phase voltages

6| 7

Monitoring Relays

1 2 3 4 5 6 7 8 9 10 11 12 ... 31 32

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