LOAD CONTROLS ROC-50 Installation, Set Up And Adjustment

ROC-50 RATE OF CHANGE LOAD CONTROL ROC-50 RATE OF CHANGE LOAD CONTROL
INSTALLATION, SET UP AND ADJUSTMENT INST ALLATION, SET UP AND ADJUSTMENT
L OAD CONTROLS
INCORPORATED
The Model ROC-50 monitors the true power going to a motor.
By sensing power (volts x amps x power factor) rather than just
amps, there is much greater sensitivity. It has two adjustable set
points.
Rate - Limits sudden increases in load regardless of total load.
Max - Limits the total load.
MOUNTING
MOUNTING
Wiring is done to un-pluggable terminal strips on the rear of the unit.
Three ways to mount:
• O n door or raceway - use cutout template
• Panel Mount - use template + optional Bezel Kit (No Charge)
• O n wall - on standard outdoor junction box + optional
O utlet Box Adapter (No Charge)
VOLTAGE
VOL T AGE
120 volts AC is taken from two of the phases. If the motor
starter already has a 120-volt control transformer with 10VA
of free capacity, it can be used. O therwise, install a separate
transformer. It is okay if the secondary is grounded.
BE SURE TO NO TE WHICH TWO PHASES SUPPL Y THE
TRANSFO RMER.
In 120/ 208V three-phase system, the 120V MUST come from a
transformer connected to two of the phases. The 120V phase to
ground voltage cannot be used.
CURRENT CURRENT
The current signal is taken from the REMAINING phase.
This current sample passes through the Range Finder Toroid.
It is VERY IMPO RTANT that the current signal comes from the phase
that IS NO T supplying the 120V control transformer. Be extra careful
when the machine has reversing starters or multi-speed windings. If a
wrong phase is used the control will either:
• Work backwards
If you are using a variable frequency drive, use a different control.
Call LOAD CO NTRO LS, INC. for help.
Call LOAD CONTROLS, INC for help.
• Have reduced sensitivity