![background image](http://html1.mh-extra.com/html/eaton/emr-5000/emr-5000_installation-operation-and-maintenance-manual_3985919672.webp)
EMR-5000
IM02602012E
47 - Voltage Unbalance Protection
Available elements:
47[1] ,47[2]
This is the 47 device Voltage Unbalance setting, which consists of the Threshold, %(V2/V1), and Delay settings. The
voltage unbalance function is based on the Main VT system 3-phase voltages.
The positive and negative sequence voltages are calculated from the 3-phase voltages. The Threshold setting defines a
minimum operating voltage magnitude of either V1 or V2 for the 47 function to operate, which ensures that the relay
has a solid basis for initiating a voltage unbalance trip. This is a supervisory function and not a trip level.
The %(V2/V1) setting is the unbalance trip pickup setting. It is defined by the ratio of negative sequence voltage to
positive sequence voltage (% Unbalance=V2/V1), or %(V2/V1) for ABC rotation and %(V1/V2) for ACB rotation. The
device will automatically select the correct ratio based on the Phase Sequence setting in the System Configuration
group described above.
This function requires positive or negative sequence voltage magnitude above the threshold setting and the percentage
voltage unbalance above the %(V2/V1) setting before allowing a voltage unbalance trip. Therefore, both the threshold
and percent settings must be met for the specified Delay time setting before the relay initiates a trip for voltage
unbalance.
The voltage unbalance pickup and trip functions are reset when the positive and negative sequence voltages V1 and
V2 drop below the Threshold setting or (V2/V1) drops below the %(V2/V1) setting minus 1%.
www.eaton.com
672
Содержание EMR-5000
Страница 62: ...EMR 5000 IM02602012E Ethernet RJ45 Terminal Marking www eaton com 62 1 8 TxD TxD RxD N C N C RxD N C N C...
Страница 271: ...EMR 5000 IM02602012E Fault Recorder Module Signals Signal Description Res record Signal Delete Record www eaton com 271...
Страница 524: ...EMR 5000 IM02602012E Motor Protection Curves Motor Protection Curve Example 1 www eaton com 524...
Страница 525: ...EMR 5000 IM02602012E Motor Protection Curve Example 2 without RTDs www eaton com 525...
Страница 526: ...EMR 5000 IM02602012E Motor Protection Curve Example 3 with RTDs www eaton com 526...
Страница 930: ...EMR 5000 IM02602012E Real Time Clock Running Reserve of the Real Time Clock 1 year min www eaton com 930...