Trane TR200 Programming Manual page 73

Parameter Description
2-13 Brake Power Monitoring
Option:
[0] * Off
[1] Warning
[2] Trip
[3] Warning and trip
If power monitoring is set to
is exceeded. This may lead to thermal overload of the resistor. It is also possible to generate a warning via a
relay/digital output. The measuring accuracy of the power monitoring depends on the accuracy of the resistance
of the resistor (better than
2-15 Brake Check
Option:
[0] * Off
[1] Warning
[2] Trip
4-36
Function:
This parameter is only active in adjustable frequency drives with an in-
tegral dynamic brake.
This parameter enables monitoring of the power to the brake resistor.
The power is calculated on the basis of the resistance (par.2-11
Resistor (ohm), the DC-link voltage, and the resistor duty time.
No braking energy monitoring is required.
Activates a warning on the display when the power transmitted over 120
s exceeds 100% of the monitoring limit (par.2-12
(kW)).
The warning disappears when the transmitted power falls below 80% of
the monitoring limit.
Trips the adjustable frequency drive and displays an alarm when the cal-
culated power exceeds 100% of the monitoring limit.
Activates both of the above, including warning, trip and alarm.
Off Warning
[0] or [1], the brake function remains active even if the monitoring limit
20%).
Function:
Select type of test and monitoring function to check the connection to
the brake resistor, or whether a brake resistor is present, and then display
a warning or an alarm in the event of a fault. The brake resistor discon-
nection function is tested during power-up. However, the brake IGBT test
is performed when there is no braking. A warning or trip disconnects the
brake function.
The testing sequence is as follows:
1. The DC link ripple amplitude is measured for 300 ms without braking.
2. The DC link ripple amplitude is measured for 300 ms with the brake
turned on.
3. If the DC link ripple amplitude while braking is lower than the DC link
ripple amplitude before braking + 1%. Brake check failed, return a
warning or alarm.
4. If the DC link ripple amplitude while braking is higher than the DC
link ripple amplitude before braking + 1%. Brake check OK.
Monitors brake resistor and brake IGBT for a short-circuit during opera-
tion. If a short-circuit occurs, a warning appears.
Monitors brake resistor and brake IGBT for a short-circuit, and to run a
test for brake resistor disconnection during power-up.
Monitors for a short-circuit or disconnection of the brake resistor, or a
short-circuit of the brake IGBT. If a fault occurs, the adjustable frequency
drive cuts out while displaying an alarm (trip locked).
Brake
Brake Power Limit
TR200 Programming Guide