Install Sheet
ZDR-16
//
Wireless Demand Response Controller
Document Ref. EPI-065-02
Installation & Safety Notes
➔
NEVER work alone.
➔
Use appropriate personal protective equipment (PPE) and follow safe electrical work practices.
➔
Only qualified electrical workers should install this equipment. Such work should be performed only after
reading the entire set of installation instructions.
➔
If the equipment is not used in a manner specified by EpiSensor, the protection provided by the equipment
may be impaired.
➔
Before performing visual inspections, tests, or maintenance on this equipment, disconnect all sources of
electric power. Assume that all circuits are live until they have been completely de-energized, tested, and
tagged. Pay particular attention to the design of the power system. Consider all sources of power, including
the possibility of backfeeding.
➔
Turn off all power supplying the meter and the equipment in which it is installed before working on it.
➔
Always use a properly rated voltage sensing device to confirm that all power is off.
➔
Before closing all covers and doors, inspect the work area for tools and objects that may have been left
inside the equipment or panel.
➔
When removing or installing metering or other equipment, do not allow it to extend into the energised bus.
➔
The successful operation of this equipment depends upon proper handling,
➔
Neglecting fundamental installation requirements may lead to personal injury as well as damage to
electrical equipment or other property.
➔
Before performing Dielectric (Hi-Pot) or Megger testing on any equipment in which the energy meter is
installed, disconnect all input and output wires to the energy meter.
➔
High voltage testing may damage electronic components contained in the meter.
➔
Failure to follow these instructions will result in death or serious injury.
HAZARD OF ELECTRIC SHOCK,
EXPLOSION, OR ARC FLASH
➔
EpiSensor equipment should be installed, operated, serviced and maintained only by qualified personnel.
EpiSensor does not assume any responsibility for any consequences arising out of the use of this
equipment.
➔
The ZDR-16 voltage measurement inputs are rated for up to 277 V L-N or 480 V L-L. For any voltage
exceeding 277 V L-N, an auxiliary power source must be used. Consult the ZDR-16 datasheet for more
information on available product variants. For voltages exceeding 480 V L-L, a voltage transformer must
be used.
➔
Fuse for neutral terminal is required if the source neutral connection is not grounded.
➔
Clearly label the device’s disconnect circuit mechanism and install it within easy reach of the operator.
➔
The fuses / circuit breakers must be rated for the installation voltage and sized for the available fault
current.
➔
Depending on the type of current transformers used with the EpiSensor ZDR, shorting links may be
required. Please consult the user guide for more information.
➔
If Voltage Transformers are used, the VT ratio setting should be adjusted on the ZDR settings page on the
Gateway.
➔
By default, there will not be a cable included for mains reference voltages
➔
ZDR’s using Rogowski coil or milliamp Current Transformers are individually calibrated and the current
transformer cables should not be extended or interchanged.
CT1
Voltage References & Current Transformer Wiring Diagram
Important:
Fused disconnect
or circuit breakers (not
supplied) to protect 0.75mm
2
conductor according to local
electrical regulations (min.
500mA)
CT3
CT2
Phase C
Phase A
Neutral
Phase B
L1
L2
L3
N
Configuration: 4 WIRE WYE
ANSI Meter Form: 9S/16S
Inputs: 3 x Vref, 3 x CT
Note: configure ZDR on Gateway for 9S/16S
3-Phase
Supply
L1
L2
L3
N
CT1
-
+
CT2
-
+
CT3
-
+
Note:
Insulation
colours for CT /
Rogowski coil cables
can vary
Note:
By default, a
single phase supply is
taken from L1 and N to
power ZDR (not shown
on this diagram). This
can be replaced with a
separate auxiliary
supply if required.
