ABB RELION REX640 Technical Manual page 399

Protection and control

Hide thumbs Also See for RELION REX640:

Table of Contents

1MRS759142 F

Table 452: Analog inputs

Improper analog channel configuration causes a validation error if the analog

channels are not completely configured or they do not match with certain settings.

For troubleshooting, check the contents of this chapter and also the preprocessing

blocks in this document. The configuration can be written to the protection relay

once the mismatch is corrected.

Operation principle

The function can be enabled and disabled with the

corresponding parameter values are "On" and "Off".

The operation of JAMPTOC can be described with a module diagram. All the

modules in the diagram are explained in the next sections.

Figure 232: Functional module diagram

Level detector

The measured phase currents are compared to the set

of the phase currents are considered for the level detection. The timer module is

enabled if at least two of the measured phase currents exceed the set

Once activated, the internal START signal is activated. The value is available only

through the Monitored data view. The time characteristic is according to DT. When

the operation timer has reached the

is activated.

When the timer has elapsed but the motor stall condition still exists, the OPERATE

output remains active until the phase currents values drop below the

that is, until the stall condition persists. If the drop-off situation occurs while the

operating time is still counting, the reset timer is activated. If the drop-off time

exceeds the set

Technical Manual

See the preprocessing function blocks in this document for the possible

signal sources.

Reset delay time , the operating timer is reset.

Three-phase currents

Operate delay time value, the OPERATE output

Protection functions

Operation setting. The

Start value . The TRMS values

Start value .

Start value ,