Dok TD Wiz1e
Dok TD Wiz1e
Dok TD Wiz1e
Contents
1 General
3 Working Principle
3.1 Summary of the different unit types
3.1.1 Tripping outputs
3.2 Setting of the relay
3.2.1 Setting of the switches
3.2.2 Inhibit of the tripping elements
3.3 Setting example
3.4 Remote tripping (only for the version C)
3.5 Overcurrent - short-circuit indications
3.5.1 Tripping indication by means of flag
indicator
4 Technical Data
5 Order form
2 TB WIZ1 07.97 E
1 General 2 Characteristics and Features
The WIZ1 is an definite time overcurrent relay for c.t. • Auxiliary voltage is not required
tripping. By the use of cast-resin impregnation, the • User-friendly setting procedure with wide setting
WIZ1 is optimally protected against climatic influ- ranges
ences. The unit does not require an auxiliary voltage, • Four 16-position setting switches for tripping current
consequently it can also be used for switchboards and time
without built-in batteries. It derives its power supply • High measuring accuracy through an efficient mi-
from the current transformer circuits from which, for croprocessor and digital processing of the measur-
special applications, it can also store the energy that is ing values
necessary to give the tripping impulse to the circuit • Remote tripping via external voltage
breaker. Due to its wide setting ranges, the tripping • Tripping output optionally as power impulse output
characteristic can be adjusted to protect a wide vari- for the direct triggering of the circuit breaker or as
ety of different equipment. potential-free change-over contacts
• Tripping indication via external flag indicator
with mechanical reset
• Compact design
• Insensitive to extreme environmental conditions
• High-accuracy components and over-rating guaran-
tee precision, reliability and a long service life
• In consideration of the specific technical data, it
complies with the requirements of VDE - regulation
0435-303, IEC 255
TB WIZ1 07.97 E 3
3 Working Principle
The alternating currents induced by the main current The crystal controlled time circuits for the overcurrent
transformers provide the WIZ1's supply energy and and short-circuit tripping steps are started at pickup of
form the measuring value. The measuring currents are the relay.
galvanically isolated via the input transformers, decou-
pled from high-frequency interferences by analog RC-
filters and then converted into current proportional volt-
ages. The voltages are rectified and compared to the
adjusted pickup value.
4 TB WIZ1 07.97 E
3.1 Summary of the different unit types 3.1.1 Tripping outputs
All relay types are available for the secondary nominal a) Electro-impulse output at unit type WIZ1-C-X-EL-1
transformer currents of 1 A or 5 A. In general, there and WIZ1-C-X-EL2-1:
are two types of tripping outputs, and therefore several
distinct versions are available. The first is the EL version By means of this output, it is possible to send power
with electro-impulse output. Type, WIZ-C-X-EL-X has pulses (10 W for 50 ms) directly to the tripping coil of
been specially developed for use in LV switchboards the c.b. (terminals 10 and 11). Through a special
which do not have an auxiliary voltage available for electronic circuit, this store takes the charging energy
c.b. tripping. The version C is suitable for mounting to directly from the measuring current and charges until a
circuit breakers and can, in the versions WIZ1-C-X-RK-1 peak voltage of approx. 24 V is reached. The tripping
and WIZ1-C-X-RL-1, also be supplied with a relay pulses (0.5 W per pulse) are repeated until the circuit
contact output. The two other unit types, WIZ1-S-X-RK- breaker switches off.
1 and WIZ1-S-X-RL-1 were designed for through-panel
mounting and are mostly used for generator protection
switchboards and feeders. Version S is only available
with a relay contact output. The relay contact outputs
can be selected as the RK - type (short tripping time) or
the RL - type (long tripping time). All units have an iden-
tical housing design and dimensions.
TB WIZ1 07.97 E 5
For other applications, i.e. with separate auxiliary
voltage circuits, the WIZ1 - relay can be supplied with
potential-free contact outputs.
This unit type has one output relay with two potential-
free change-over contacts for the tripping at overcur-
rent and short-circuit.
6 TB WIZ1 07.97 E
c) Relay contact output at types WIZ1-S-X-RK-1,
WIZ1-S-X-RL-1 and WIZ1-S-X-RK2-1:
TB WIZ1 07.97 E 7
3.2 Setting of the relay
All switches for the relay setting are located on the Two LEDs indicate pickup of the overcurrent element I>
front plate of the WIZ1. The function designation is and the short-circuit element I>>.
indicated next to the switches. To adjust the values be-
low, four 16-position BCD switches are available. The overcurrent and short-circuit elements can be
blocked by means of two coding plugs.
I> Overcurrent pickup value
I>> Short-circuit current tripping value
tI> Tripping delay for the overcurrent element
tI>> Tripping delay for the short-circuit current
tripping element
WIZ1-C-X-EL-1 WIZ1-S-X-RK-1
WIZ1-C-X-RK-1 WIZ1-S-X-RL-1
WIZ1-C-X-RL-1 WIZ1-S-X-RK2-1
WIZ1-C-X-RK2-1
WIZ1-C-X-EL2-1
8 TB WIZ1 07.97 E
3.2.1 Setting of the switches
Table 3.2:
ATTENTION!
If no coding plug is inserted, both tripping elements
are blocked, there is no tripping in case of failure!
TB WIZ1 07.97 E 9
3.3 Setting example 3.4 Remote tripping
(only for the version C)
The tripping characteristic as shown below is to be ad-
justed. It is divided into two ranges: The input "remote tripping" (terminals 13 and 14) al-
lows tripping by an external alternating voltage, i.e.
1. Range for the overcurrent element with the tripping by a thermal tripping coil, Buchholz protection or other
current I> and tripping delay tI>. remote tripping commands. Bypassing the measuring
2. Range for the highset short-circuit element with the circuits, this input, with a delay of 0.6 to 5 s, has an
tripping current I>> and tripping time tI>> effect on the tripping circuit.
Warning! A continuous signal must not be allowed
to remain on this input. A signal of 230 V/AC is al-
lowed to remain for a maximum of 30 minutes.
With a signal in the range 195 V to 210 V the relay
contacts periodically switch. From 210 V to 250 V a
100
constant off signal is given.
The input terminals are galvanically isolated from the
electronic part of the relay.
Low set element I>; tI>
10 TB WIZ1 07.97 E
Tripping ranges
100 100
10 10
t[s] t[s]
1 1
0.1 0.1
0.01 0.01
1 10 100 1 10 100
I/IN I/IN
100
10
t[s]
0.1
0.01
1 10 100
I/IN
TB WIZ1 07.97 E 11
100 100
10 10
t[s] t[s]
1 1
0.1 0.1
0.01 0.01
1 10 100 1 10 100
I/IN I/IN
12 TB WIZ1 07.97 E
4 Technical Data
Measuring input
Accuracy
General data
TB WIZ1 07.97 E 13
RK2 - types
Accuracy of trip delay: for tI> ±20 ms
for tI>> range 2 - 4 x IN +10 ms
for tI>> range 4 - 17 x IN +4 ms
EL2 - types
Accuracy of trip delay: for tI> ±20 ms
for tI>> range 3.5 - 4.5 x IN + 10 ms/-4 ms
for tI>> range 4.5 - 19.5 x IN + 1 ms/-8 ms
Outputs
14 TB WIZ1 07.97 E
Electro-impulse-output
Indication elements
Option flag: external flag with mechanical reset function for the
indication of a trip signal
Tests
Enclosure: electronics: IP 67
signal and control terminals: IP 20
transformer connection terminals: IP 00
Material: Makrolon 6030, self-extinguishing
Width, heigth, depth: see dimensional drawings
Fastening type: with screws
Weight: 1.8 kg
Installation position: any
TB WIZ1 07.97 E 15
Fig. 4.1: Housing WIZ1
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Cut out dimensions
TB WIZ1 07.97 E 17
5 Order form
Mode of installation, S
panel mounting,
1 change-over contact; overcurrent tripping
1 change-over contact; short circuit current tripping
1 change-over contact as common relay contact output for
tripping of overcurrent and short circuit current
Rated current 1A -1
5A -5
Electric impulse output -EL
with long tripping time tI> 5 s to 20 s
18 TB WIZ1 07.97 E
Woodward SEG GmbH & Co. KG
Krefelder Weg 47 ⋅ D – 47906 Kempen (Germany)
Postfach 10 07 55 (P.O.Box) ⋅ D – 47884 Kempen (Germany)
Phone: +49 (0) 21 52 145 1
Internet
Homepage http://www.woodward-seg.com
Documentation http://doc.seg-pp.com
Sales
Phone: +49 (0) 21 52 145 635 ⋅ Telefax: +49 (0) 21 52 145 354
e-mail: kemp.electronics@woodward.com
Service
Phone: +49 (0) 21 52 145 614 ⋅ Telefax: +49 (0) 21 52 145 455
e-mail: kemp.pd@woodward.com