Bender WS Series Quick start guide

130 TDB409015en / Main catalogue part 1 – Insulation monitoring / 05.2011
Dipl.-Ing. W. Bender GmbH & Co. KG • Londorfer Str. 65 • 35305 Grünberg • Tel.: [phone] • Fax: [phone]
Subject to change! – © Dipl.-Ing. W. Bender GmbH & Co. KG, Germany
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Measuring current transformers of the WS… series
Measuring current transformers of the WS…-8000 series
WS50x80 series
measuring current transformers
WS50x80-8000 series
measuring current transformers
Product description
WS… and WS…-8000 series split-core type measuring current transformers can be opened
using the interlock knob to enclose the conductors to be monitored. That allows easy
retrofitting in existing installations.
WS… und WS…-8000 series measuring current transformers are highly sensitive measuring
current transformers of split-core type which in combination with RCM and RCMS series
residual current monitors and evaluators convert AC currents into evaluable measurement
signals.
In addition, the measuring current transformers can be used in combination with insulation
fault location systems (EDS) for IT systems. They are designed to measure the locating
current generated by a PGH locating current injector or an A-ISOMETER® IRDH. In combination
with EDS series insulation fault locators the test current is converted into evaluable signals.
Connection to the respective devices is via a two-wire cable.
Standards
WS… and WS…-8000 series measuring current transformers comply with the device
standard: IEC 60044-1.
Installation instructions
• Make sure that all live conductors are routed through the measuring current transformer
• Do not route shielded conductors through the measuring current transformer
• Never route a PE conductor through the measuring current transformer!
Wiring diagram
WS50x80 series,
split-core type measuring current transformers
WS50x80-8000 series
split-core type measuring current transformers
Device features
WS… series measuring current transformer
• For RCMS460/490 series residual current
monitoring systems
• For RCM420, RCM460 and RCM470 series
residual current monitors
• For EDS470, EDS460 / 490 series insulation
fault locators
WS…-8000 measuring current transformer
• for EDS473(E)-12, EDS474(E)-12, EDS461
and EDS491 series insulation fault locators
Standards, approvals and certifications
WS… series measuring current transformer
Connection to the respective RCMS series
residual current monitoring system, RCM
series residual current monitor or to an EDS
series insulation fault location systems.
WS…-8000 measuring current transformer
Connection to the respective insulation
fault locator EDS473(E)-12, EDS474(E)-12,
EDS461 and/or EDS491.

TDB409015en / Main catalogue part 1 – Insulation monitoring / 05.2011 131
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WS… series measuring current transformers – WS…-8000 series measuring current transformers
Technical data
Insulation coordination acc. to IEC 60664-1 / IEC 60664-3
Rated insulation voltage 800 V
Rated impulse voltage/pollution degree 8 kV / III
CT circuit WS…
Rated primary residual current 30 mA…10 A
Rated secondary residual current 0.0167 A
Rated transformation ratio Kn10 / 0.0167 A
Rated burden ≤ 180 Ω*
Nominal power 0.05 VA
Frequency range 42 Hz…3 kHz
Rated continuous thermal current Icth 40 A
Rated short-time thermal current Ith 60 x Icth = 2.4 kA / 1 s
Rated dynamic current Idyn 2.5 x Ith = 6.0 kA / 40 ms
CT circuit WS…-8000
Rated primary residual current 30 mA…1 A
Rated secondary residual current 0.000125 A
Rated transformation ratio Kn10 / 0.000125 A
Rated burden 2400 Ω
Nominal power 0.0375 VA
Frequency range 42 Hz…3 kHz
Rated continuous thermal current Icth 6 A
Rated short-time thermal current Ith 60 x Icth = 0.36 kA / 1 s
Rated dynamic current Idyn 2.5 x Ith = 0.9 kA / 40 ms
Environment
Operating temperature -25 °C…+70 °C
Climatic class acc. to IEC 60721
Stationary use (IEC 60721-3-3) 3K5 (except condensation and formation of ice)
Transport (IEC 60721-3-2) 2K5 (except condensation and formation of ice)
Long-time storage (IEC 60721-3-1) 1K5 (except condensation and formation of ice)
Classification of mechanical conditions IEC 60721
Stationary use (IEC 60721-3-3) 3M4
Transport (IEC 60721-3-2) 2M2
Long-time storage (IEC 60721-3-1) 1M3
Connection
Connection screw-type terminals
rigid/flexible/conductor sizes 0.08…2.5 / 0.08…2.5 mm² / 28…12 AWG
Stripping length 8…9 mm
Connection EDS, RCM(S) measuring current transformers
Single wire ≥ 0.75 mm² 0…1 m
Single wire, twisted ≥ 0.75 mm² 0…10 m
Shielded cable ≥ 0.5 mm² 0…40 m
Recommended cable
(shielded, shield on one side connected to L-conductor, not connected to earth) J-Y (St) Y min. 2x0.8
Other
Degree of protection, internal components (IEC 60529) IP40
Degree of protection, terminals (IEC 60529) IP 20
Screw mounting M5 with mounting brackets
Flammability class UL94 V-0
Operating manual WS… TBP409015
Operating manual WS…-8000 TBP108018
Approvals and certifications UL under development, GOST
* The rated burden may vary depending on the respective device
data sheet.
Dimension diagram
Ordering information
Type Internal dimensions Mounting
brackets
Art. No.
WS20x30 20 x 30 mm × B 9808 0601
WS50x80 50 x 80 mm × B 9808 0603
WS80x120 80 x 120 mm × B 9808 0606
WS20x30-8000* 20 x 30 mm × B 9808 0602
WS50x80-8000* 50 x 80 mm × B 9808 0604
Dimensions
Type A B C D E Weight
WS20x30 93 106.15 23 33 64 ≤ 0.6 kg
WS50x80 125 158.15 55 85 96 ≤ 1.04 kg
WS80x120 155 198.15 85 125 126 ≤ 1.4 kg
WS20x30-8000* 93 106.15 33 33 64 ≤ 0.63 kg
WS50x80-8000* 125 158.15 85 85 96 ≤ 1.08 kg
Dimensions in mm
Selection list
Type
RCM420 RCM470 RCMS460
RCMS490
RCMS470 EDS460
EDS490
EDS461
EDS491
EDS470 EDS473 EDS474
WS20x30 ×××××--×----
WS50x80 ×××××--×----
WS80x120 ×××××--×----
WS20x30-8000* -- -- -- -- -- × -- × ×
WS50x80-8000* -- -- -- -- -- × -- × ×
* For EDS461/491 and EDS473/474 series insulation fault locators