Related Manuals for Cybertronix Sentinel EFI-BLZ
Summary of Contents for Cybertronix Sentinel EFI-BLZ
- Page 1 Sentinel™ EFI-BLZ 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
Sentinel™ EFI-BLZ User’s Manual CONTENTS SAFETY ..............................3 WARRANTY ............................3 1. OVERVIEW ............................4 2. FEATURES ............................4 3. INSTALLATION ..........................4 3.1 CURRENT SENSOR ........................4 3.1.1 MULTI-CORE CABLE SYSTEM ....................4 3.1.2 SINGLE-CORE CABLE SYSTEM ....................6 3.2 INDICATING UNIT ........................ -
Page 3: Safety
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. -
Page 4: Overview
Sentinel™ EFI-BLZ User’s Manual 1. OVERVIEW The Sentinel™ earth fault indicator (EFI) is an electronic relay used for the rapid location and isolation of earth faults on HV cable networks. The EFI can be used in radial networks or in openly operated ringed networks. - Page 5 Sentinel™ EFI-BLZ 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 6: Single-Core Cable System
Sentinel™ EFI-BLZ User’s Manual 3.1.2 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 7: Remote Indicator
Sentinel™ EFI-BLZ User’s Manual REMOTE INDICATOR 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. The remote indicator mirrors the flash rate and duration of the primary LED indicator of the main indicating unit. -
Page 8: Scada Relay
Sentinel™ EFI-BLZ User’s Manual The indicating unit continuously monitors the output signal from the current sensor. The current sensor transmits a voltage which is proportional to the measured current. For primary currents in excess of the trip level the current sensor saturates and a limiting circuit inside the indicating unit clamps the output voltage to below 10V even for high fault currents. -
Page 9: Manual Test
Sentinel™ EFI-BLZ User’s Manual at a rate of about 1Hz. The remote indicator is weather-proof and is housed inside a brass bolt which also makes it vandal-proof. 4.2.3 MANUAL TEST A test/reset pushbutton is accessible on the front panel of the indicating unit. The pushbutton only activates after being depressed for three seconds. -
Page 10: Specifications
Sentinel™ EFI-BLZ User’s Manual 6. SPECIFICATIONS Network voltage range: 1-36kV Trip current: 50A ±10A Minimum fault duration: 2.5 cycles (50ms @ 50Hz / 40ms @ 60Hz) Fault current withstand: 25kA for 1s Primary indication: LED, flash rate 1Hz nominal Timer reset: 4 or 8 hours selectable Manual test/reset: Front pushbutton initiates trip/reset... -
Page 11: Ordering
Sentinel™ EFI-BLZ User’s Manual Battery -type: 3.6 V, ½AA, lithium battery -specification: Model ER14250 or similar -international size refs: ½AA, 1/2R6, 1/2UM-3 -capacity: 1200mAH -open circuit voltage: 3.7 V -quiescent current: <5 µA -flashing current: <0.8 mA -shelf life: >10 years -flashing life: >1000 flashing hours (>500 hours with remote indicator) -temperature effects:...
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