Cybertronix Sentinel EFI-BFZ Installation Instructions

Enclosure
lid
Battery
Flag indicator
Reset timer
setting
Remote
indicator
terminal
INSTALLATION INSTRUCTIONS

PACKING CONTENTS:

Control Unit:
•
Current Transformer:
•
• 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 M4×16 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.

Selecting the Reset Time

Select the appropriate reset time for the unit by setting the reset timer DIP switch onboard the Control Unit.

Installing the Remote Indicator (optional)

The M10x20 bolt 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.

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-BFZ
Mounting
holes Earth Fault Indicator
• Battery powered
Test/Reset
pushbutton
• Flag indication
• Remote indicator output
CT terminal
• Auxiliary relay output contact
Auxiliary
relay
Please read safety instructions carefully
terminal
Grey ABS box enclosure with product information and warning labels
CT100 (standard) or CT150 or CT300
2 meter lead (standard option), or as ordered
2 meter lead (standard option), or as ordered