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Summary of Contents for Cybertronix SENTINEL EFI-MLZ
- Page 1 Sentinel™ EFI-MLZ EARTH FAULT INDICATOR USER’S MANUAL Tel: +27 87 379 5220 Email: info@cybertronix.co.za Ver. 4.1 3 Glenart Road, Kloof 3610, South Africa www.cybertronix.co.za...
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Page 2: Table Of Contents
CONTENTS 1. SAFETY NOTICE ..........................3 2. OVERVIEW ............................4 3. FEATURES ............................4 4. INSTALLATION ..........................4 4.1 CURRENT SENSOR ........................4 4.1.1 MULTI-CORE CABLE SYSTEM ....................5 4.1.2 SINGLE-CORE CABLE SYSTEM ....................7 4.2 INDICATING UNIT ........................7 4.3 REMOTE INDICATOR (OPTIONAL) .................... -
Page 3: Safety Notice
Sentinel™ EFI-MLZ User’s Manual 1. SAFETY NOTICE Review the following safety precautions to avoid serious injury or death and to prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. -
Page 4: Overview
User’s Manual 2. OVERVIEW The Sentinel EFI-MLZ is one of a family of Earth Fault Indicator (EFI) products that is designed to assist in the rapid location and isolation of earth faults on high voltage cable networks. The EFI can be used in radial networks or in openly operated ringed networks. -
Page 5: Multi-Core Cable System
Sentinel™ EFI-MLZ User’s Manual 4.1.1 MULTI-CORE CABLE SYSTEM The Sentinel EFI ships with a standard sized (CT100) current sensor, which is suitable for most multi- core cable systems. A larger current sensor (CT150) is also available but must be specified at time of order. - Page 6 Sentinel™ EFI-MLZ User’s Manual FIGURE 1: CURRENT SENSOR MOUNTED ON MULTI-CORE CABLE SYSTEM TERMINATION L1 L2 L3 SCREEN CURRENT SENSOR CURRENT SENSOR OUTGOING CABLE EARTH EQUIVALENT CIRCUIT FIGURE 2: CURRENT SENSOR MOUNTED ON SINGLE-CORE CABLE SYSTEM TERMINATION L1 L2 L3 SCREEN CURRENT SENSOR...
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Page 7: Single-Core Cable System
Sentinel™ EFI-MLZ User’s Manual 4.1.2 SINGLE-CORE CABLE SYSTEM A larger current sensor (CT300) is available for application on single core cable systems. These systems usually consist of three single-core cables spaced in a row, side-by-side. The flexible sensor core is wrapped tightly around all three cables forming a rectangular oval, and fastened in place with cable-ties. -
Page 8: Remote Indicator (Optional)
Sentinel™ EFI-MLZ User’s Manual 4.3 REMOTE INDICATOR (O PTIONAL A remote indicator can be ordered separately or ordered pre-installed. The remote indicator is designed to be mounted through a hole in the switchgear enclosure so that it is visible from the outside. -
Page 9: Indicating Unit
Sentinel™ EFI-MLZ User’s Manual 5.2 INDICATING UNIT The primary indication on the EFI-MLZ is a light-emitting-diode (LED). The LED will flash at approximately 1Hz when the EFI is in a tripped state and remain extinguished when the EFI is in a reset state. -
Page 10: Testing
Sentinel™ EFI-MLZ User’s Manual 6. TESTING The Sentinel EFI can be fully tested by injecting test current though the current sensor. A test procedure for the default trip level of 50A is suggested below. 1. Connect the device to mains voltage for at least 5 minutes to charge the supply. 2. -
Page 11: Specifications
Sentinel™ EFI-MLZ User’s Manual 7. SPECIFICATIONS Network voltage range: 1-36kV Rated mains voltage: 110V-230V ±20% Frequency: 50Hz / 60Hz ±20% Overvoltage withstand: 600V for 48 hours Impulse voltage withstand: 10kV, 1.2/50us waveform Trip current: 50A ±10A (factory programmable) Minimum fault duration: 2.5 cycles (50ms @ 50Hz / 40ms @ 60Hz) Fault current withstand: 25kA for 1s... - Page 12 Sentinel™ EFI-MLZ User’s Manual -mounting: Self-mounting through single M12 Hole -lead length: -lead type: 2-core, 0.5mm , doubly insulated -degree of protection IP65 -indication method Flashing LED -flash rate: 1Hz nominal -flashing duration: 6 hours nominal (includes LED primary indication) Version 4.1 Page 12 of 15...
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Page 13: Ordering
Sentinel™ EFI-MLZ User’s Manual 8. ORDERING Table 1 below shows the codes to be used for product ordering. Only the first three code groups need to be specified for the standard versions of the product. The standard versions ships without the items from groups 4, 5 and 6, and with a standard size current transformer (CT100 with 3m lead). - Page 14 Sentinel™ EFI-MLZ User’s Manual For Example: ORDERING CODE DESCRIPTION EFI-MLZ (standard version) - Mains powered - LED indication - 50A trip (factory programmable) - CT diameter 100mm, 3m lead EFI-MLZ-M5-R7-A2-CT150-C3 - Mains powered - LED indication - 50A trip (factory programmable) - Mains cable, 5m lead - Remote indicator, 7m lead - Auxiliary relay, 2m lead...
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Page 15: Warranty
In the event of the above limitation not applying to the user, then in no case shall the Cybertronix cc liability exceed the original purchase price of the product.
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