Bender W1-35/8000 - User Manual

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Messstromwandler

für EDS473/474

Bestimmungsgemäße Verwendung

Die Messstromwandler W1-35/8000, WS50x80/8000, W10/8000,

WS20x30/8000, W10/8000-6 sind für den Einsatz mit der Isolati-

onsfehler-Sucheinrichtung für IT-Systeme EDS473/474 geeignet.

Sie dienen zur Erfassung des vom PGH473/474 generierten Prüf-

stromes.

Sicherheitshinweise allgemein

Montage, Anschluss und Inbetriebnahme nur durch Elektrofach-

kraft!

Beachten Sie unbedingt:

● die bestehenden Sicherheitsvorschriften,

● das beiliegende Blatt "Wichtige sicherheitstechnische Hin-

weise für BENDER-Produkte",

● den Beipackzettel EDS473 bzw. EDS474,

● das Bedienungshandbuch EDS473 bzw. EDS474.

Funktionsbeschreibung

Die Verbindung zwischen Messstromwandler und Auswertegerät

EDS473-12 bzw. EDS474-12 erfolgt über 2 Anschlussdrähte mit

mindestens 0,75 mm

Querschnitt. Die Leitungslänge darf 40 m

nicht überschreiten.

Alle stromführenden Leiter müssen durch den Messstromwand-

ler geführt werden, jedoch nicht der PE.

Unterschiedliche Ausführungen

Die Messstromwandler unterscheiden sich in Größe und Bau-

form. Sie bestehen aus einem speziellen Magnetkern und einer

Wicklung, die in einem Kunststoffgehäuse montiert sind.

● W1-35/8000 und W10/8000 sind Ringkernwandler;

● WS20x30/8000 und WS50x80/8000 sind teilbare Rechteck-

wandler.

● W10/8000-6 ist ein Montageprofil mit sechs W10/8000 zur

Montage in Einbauverteiler.

Montage und Anschluss.

Montage

Befestigung am Kabel mittels Kabelbindern oder Schraubbefesti-

gung an Laschen.

Wandlerbefestigungen nicht mit magnetisch geschlossenen

Kreisen verbinden. Montage in der Nähe von starken Magnetfel-

dern vermeiden.

Stellen Sie vor Einbau des Gerätes und vor Arbeiten

an den Anschlüssen des Gerätes sicher, dass die An-

lage spannungsfrei ist.

Wird dies nicht beachtet, so besteht für das Personal

die Gefahr eines elektrischen Schlages.

Außerdem drohen Sachschäden an der elektrischen

Anlage und die Zerstörung des Gerätes.

Measuring current transformers

for EDS473/474

Intended use

The measuring current transformers (CTs) W1-35/8000,

WS50x80/8000, W10/8000, WS20x30/8000, W10/8000-6 de-

scribed in this sheet are used in combination with insulation fault

location systems for IT systems EDS473/474. The measuring cur-

rent transformers measure the test current generated by the test

device PGH473/474.

Safety information

Installation, connection and commissioning of electrical equip-

ment shall only be carried out by qualified electricians.

Particular attention shall be paid to:

● the current safety regulations,

● the enclosed sheet „Important safety instructions for

BENDER products“,

● the EDS473 resp. EDS474-12 instruction leaflet,

● the EDS473 resp. EDS474-12 operating manual.

Function

The measuring current transformers have to be connected to the

evaluator EDS473-12 resp. EDS474-12 via 2 wires with a minimum

cross section of 0.75 mm

. The maximum cable length is 40 m.

All live conductors of the system to be monitored except the PE

have to be passed through the CT.

Different versions

There are different versions of measuring current transformers

with different sizes and enclosures. All measuring current trans-

formers consist of a special magnetic core and a winding built

into a plastic enclosure.

● W1-35/8000 and W10/8000 are circular type measuring

current transformers,

● WS50x80/8000 and WS20x30/8000 are split-core type

measuring current transformers,

● W10/8000-6 is a mounting angle with six included W10/

8000 ready for installation in built-in distributors.

Installation and connection.

Installation

Fixing directly on the cable with cable ties or screw mounting. Do

not connect the CT fixing parts with magnetically closed circuits.

Avoid the installation in proximity of strong magnetic fields.

Measuring current transformers not conneted to an evaluator

must be short-circuited (terminals k, l) via a bridge (min. 1.5 mm

)

and connected to PE.

Prior to installation and before work activities are

carried out on the connecting cables, make sure that

the mains power is disconnected.

Failure to comply with this safety information may

cause electric shock to personnel.

Furthermore, substantial damage to the electrical in-

stallation and destruction of the device might occur.

W1-35/8000 ... WS20x30/8000

108008 / 08.03

Deutsch English

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Overview

Function Description
Important Technical Specifications
Insulation Coordination (according to IEC 60664-1)
Measuring Circuit
General Data
Usage Features
Maintenance Features

The BENDER W1-35/8000 ... WS20x30/8000 series of measuring current transformers (CTs) are designed for use with the EDS473/474 insulation fault location systems in IT systems. These CTs are crucial for measuring the test current generated by the PGH473/474 test device, enabling effective fault detection and location.

Function Description:

The measuring current transformers are integral components of an insulation fault location system. They are connected to the EDS473-12 or EDS474-12 evaluator via two wires, each with a minimum cross-section of 0.75 mm². The maximum permissible cable length for this connection is 40 meters. The primary function of these CTs is to detect and measure the test current generated by the PGH473/474 test device, which is injected into the IT system to identify insulation faults. All live conductors of the system under monitoring, with the exception of the protective earth (PE) conductor, must be routed through the measuring current transformer. The PE conductor must never be passed through the CT during residual current measurements. For optimal performance, conductors should be passed through the CT symmetrically and at a right angle. Unused measuring current transformers must be short-circuited by connecting their S1(k) and S2(I) contacts to PE. The S2(I) connections of all measuring current transformers should always be connected to a common terminal strip, with a maximum cable length of 25 cm between this strip and the EDS47x-12 evaluator.

Important Technical Specifications:

Insulation Coordination (according to IEC 60664-1):

Rated voltage U_m: AC 630 V
Rated impulse voltage/pollution degree: 6 kV/3

Measuring Circuit:

Rated transformation ratio: 8000/1 (1 A/125 µA)
Rated burden: 24 kΩ
Max. rated primary current: 1 A
Min. rated primary current: 1 mA
Nominal power: 0.375 mW
Nominal frequency: 50 ... 400 Hz
Internal resistance: 500 ... 800 Ω
Secondary overvoltage protection with suppressor diode P6KE6V8CP: 6.8 V
Accuracy class: 5
Rated continuous thermal current: 6 A
Rated short-time thermal current: 0.75 kA/1 s
Dynamic rated current: 4.2 kA/30 ms

General Data:

Standard: IEC 60044-1
Shock resistance (acc. to IEC 60068-2-27, built-in): 15 g/11 ms
Bumping (IEC 60068-2-29, during transport): 40 g/6 ms
Vibration resistance (IEC 60068-2-6, built-in): 1 g/10 ... 150 Hz
Vibration resistance (IEC 60068-2-6, device out of service): 2 g/10 ... 150 Hz
Ambient temperature (during operation): -10 °C ... +55 °C
Ambient temperature (during storage): -40 °C ... +70 °C
Climatic category (acc. to DIN IEC60721-3-3): 3K5
Operating mode: Continuous operation
Position: Any position
Connection: Screw terminals
Connection rigid, flexible: 0.2 ... 4 / 0.2 ... 2.5 mm²
Connection flexible with connector sleeve (without/with plastic sleeve): 0.25 ... 2.5 mm²
Conductor sizes (AWG): 24-12
Type of connection to the measuring current transformer:
- Single wires ≥ 0.75 mm²: up to 1 m
- Single wires, twisted ≥ 0.75 mm²: up to 10 m
- Screened cable ≥ 0.6 mm² (single-ended connection to PE) e.g. JY(ST)Y 2 x 0.6: up to 40 m
Degree of protection (according to DIN EN 60529):
- Built-in: IP40
- Terminals: IP20
Screw mounting: M5
Flammability class: UL94V-0

Usage Features:

The W1-35/8000 ... WS20x30/8000 series offers various form factors to suit different installation requirements:

W1-35/8000 and W10/8000: These are circular type measuring current transformers, ideal for applications where a ring-core design is suitable.
WS50x80/8000 and WS20x30/8000: These are split-core type measuring current transformers, offering flexibility for installation around existing conductors without requiring disconnection.
W10/8000-6: This version is a mounting angle that includes six W10/8000 CTs, pre-assembled for convenient installation in built-in distributors.

All CTs consist of a special magnetic core and a winding enclosed within a plastic housing, ensuring durability and protection. Installation should only be performed by qualified electricians, adhering to current safety regulations and the specific instructions provided in the product documentation. Prior to installation and any work on the connecting cables, it is crucial to ensure that the mains power is disconnected to prevent electric shock and damage to the equipment. The CTs can be fixed directly to cables using cable ties or screw-mounted via integrated lugs. It is important not to connect the CT fixing parts with magnetically closed circuits and to avoid installation near strong magnetic fields, which could interfere with accurate measurements.

Maintenance Features:

The device manual emphasizes the importance of proper installation and initial checks to ensure reliable operation. Before commissioning, the connection of the measuring current transformer must be thoroughly checked. If an EDS473 or EDS474 evaluator immediately signals a fault after commissioning, it is recommended to check the operating circuit and the connected loads upstream of the devices for insulation faults. A functional test using a genuine earth fault, possibly via a suitable resistance, is recommended to verify the system's performance. The robust design and adherence to international standards (DIN EN 60044-1:2001-11) ensure long-term reliability and minimal maintenance requirements under normal operating conditions. The product is designed for continuous operation and can be installed in any position.