Cybertronix Sentinel EFI-MLZ Installation Instructions

Enclosure
Lid
LED Indicator
Mains
Supply
Terminal
Remote
Indicator
Terminal
INSTALLATION INSTRUCTIONS
PACKING CONTENTS:
• Control Unit:
• Current Transformer:
Mains Cable (optional):
•
• Remote LED Indicator (optional):
• Auxiliary Relay Cable (optional):
INSTALLATION INSTRUCTIONS
Installing the Control Unit
The Control Unit is surface mounted using the two 4mm mounting holes provided. To access the mounting holes, unscrew the four screws securing
the lid of the Control Unit. Two M4 × 16mm bolts are located inside the enclosure for mounting the unit. After mounting, replace the cover of the
unit, and secure tightly with the four screws to ensure good sealing.
Installing the Remote Indicator (optional)
The remote indicator consists of a M10 bolt and should be mounted in a secure place where the indication is required.
Connecting the Auxiliary Relay (optional)
For additional remote fault signaling the auxiliary relay cable is connected through a cable gland to the two-way screw terminal marked "RELAY".
This is a normally-open circuit.
Connecting the Mains Supply
The mains cable is connected though a cable gland to the two-way screw terminal marked "MAINS".
Trip Level Selection (optional)
The trip level of the device is selected via a jumper located inside the control unit.
Installing the Current Transformer (CT)
The current transformer comprises of a flexible iron-core belt with a magnetic
pickup coil. The CT is wrapped tightly around the three-phase system to be
monitored using the adjustable cable ties provided.
NOTE: The CT should not encircle the HV cable earth lead as well. Instead the
earth lead should by-pass the CT, as shown in Figure 1 and Figure 2.
Multi-Core Cable System
The CT100 and CT150 sensors are used for multi-core cable systems. The CT is
mounted on the screened part of the cable below the strip-back point as shown
in Figure 1. The center cable-tie of the CT sensor is used to secure the sensor
firmly on the cable. The flexible iron-core of the sensor is wrapped in a closed
overlapping circle around the cable and pulled tightly with the second cable-tie as
far as is possible. The screen of the cable is turned back underneath the sensor
and terminated as shown.
Single-Core Cable System
For single-core cable systems a larger CT300 sensor is used. The flexible iron-core
of the sensor is wrapped in a closed overlapping circle around the cable as tightly
as possible and secured in place with cable-ties. Care should be taken to ensure
that the sensor is mounted on the screened part of the cable. The screen of all
three conductors should be turned underneath the core and terminated as
shown in Figure 2.
Sentinel™ EFI-MLZ
Mounting
Earth Fault Indicator
Holes
Test/Reset
• Mains powered
Pushbutton
• Flashing LED
Trip Level
Select
• SCADA relay output contact
CT Terminal • Remote indicator output contact
• 50A trip level
Auxiliary
Relay
Please read safety instructions carefully
Terminal
Grey ABS box enclosure with product information and warning labels
CT100 (standard) or CT120, CT150, CT300
3 meter lead (standard option), or as ordered
2 meter lead (standard option), or as ordered
2 meter lead (standard option), or as ordered