Burden Module; Ct Module; Power Analyzer High Voltage Module; 2.5.1 Backspin / High Voltage Inputs - Sensia INSTRUCT ESP Configuration Manual

ESP Switchboard Configuration via ESP Controller
2.3

BURDEN MODULE

The CT inputs measure voltage. A burden module is required to convert the current from the CT into a
voltage prior to interfacing to the Controller. There exists a unique 1000:1 Burden Module (PN: 100468928,
CT BURDEN MODULE).
2.4

CT MODULE

This current transformer is designed to only operate with the Standard 200A Switchboards. The CT module
is three individual 200:5 Current Transformer (PN: 100667780)
2.5

POWER ANALYZER HIGH VOLTAGE MODULE

2.5.1 BACKSPIN / HIGH VOLTAGE INPUTS

The Power Analyzer High Voltage Module contains a 3-phase backspin/HV input for the purpose of detecting
motor rotation while the motor is not powered. The motor rotation may be the result of well characteristics
continuing to flow or fluid in the pipe draining back into the formation. Depending on the requirement, the
Controller can be configured to not start the motor while rotation is present or start only if below a rotation
threshold.
The backspin/HV input measures the frequency of the motor rotation and has alarm parameters associated
with the frequency detection setting. There is a configurable time delay that the controller must wait before
starting once the alarm has cleared. This timer will not start during a spin condition and the Controller will
remain in the alarm state until the rotation drops below threshold, at which point the timer will start.
Backspin detection is designed to detect very small signals and functions with the system off. During system
operation, system harmonics can create false triggers on frequency measurement.
The Power Analyzer HV Module contains a DC blocking filter. For applications where a downhole tool (DHT)
is used with an electric submersible pump (ESP), the DC power for the DHT will not affect the Power
Analyzer HV Module. The motor rotation signal pass through the DC blocking filter unaffected.
Potential Severity: Serious
Potential Loss: Assets, Personnel
Hazard Category: Electrical, Machinery equipment hand tools
Starting a motor which is spinning in reverse direction creates a very large current to
stop the motor, then start the motor in the correct direction. Damage to motor winding
WARNING
may result.

2.5.2 LEG GROUND

The Power Analyzer Card performs leg ground measurement using the Power Analyzer HV Module. Leg
ground measures the phase-ground voltage and unbalance which indicates insulation degradation and
ground fault problems. A single-phase dead short will show a 100% reading.
The measurements of frequency and voltage can determine motor rotation and line voltage.
Section 2: Theory of Operations
11