sprecher + schuh PCEC Series User Manual

Chapter 1:3
Chapter 1: Introduction
is PCEC elevator panel solution provides both advanced motor control and simple
diagnostics. e following information provides a brief overview of the basic product
features.
Motor Control
Current Limit
rough the use of internal current sensors, the PCEC will regulate
the current level applied to the motor over the programmed period of
time. is type of motor control produces a slow start and insures that
the current does not exceed the programmed level. is is standard
conguration of the device and aligns well with traditional applications.
Soft Start
During Soft start, the voltage is ramped from an initial set point to full
voltage over the programmed period of time. is type of motor control
produces a smooth start in less time than the current limit setting, however
the current is not restricted.
Soft Stop
Soft stop provides the ability to ramp down the voltage applied to the
motor over a programmed period of time. e result is a smooth stop.
Diagnostics
Overload
e built in motor overload provides protection of the motor for over
current conditions. is protection feature oers a user selectable
setting called the trip class, which can be used to accommodate dierent
applications and motor types. When the motor draws more than the
nominal value of current for a period of time, the device will fault on a
motor overload fault.
Over Temperature
e product includes a built in self monitoring method for detecting a
SCR over-temperature condition. If the internal temperature exceeds a
design threshold the device will fault on a SCR Overtemp fault.
Phase Reversal
e user can select the phase relationship of the incoming power. If this
phase relationship changes, the device will fault indicating a problem.
Phase Loss/
Open Load
When any one of the incoming 3 phases are lost, the controller will fault
indicating a phase loss condition has occurred.
Phase Imbalance
When enabled, this motor protection feature will detect if a phase
imbalance condition exists and fault the unit. A phase imbalance is dened
as a 65% dierential between the highest and lowest phase for more than
3 seconds.
Shorted SCR
Each time the PCEC initiates a start, it checks to see if the SCR’s are
operating correctly. If the controller is unable to properly turn on and o
any one of the SCR’s, the device will fault on a Shorted SCR fault.
Function
Overview

sprecher + schuh PCEC Series Specifications

General

Brand	sprecher + schuh
Model	PCEC Series
Category	Controller
Language	English