Frequently Asked Questions
See below for answers to some of our frequently asked quesitions.
Power Sentry cares for our communities and our environment, by manufacturing products that help our customers lower power consumption and help improve operational stability. We believe that every day offers us an opportunity to have a positive impact on our surroundings in partnership with our customers.
On-Site Storage
- Bean pumping units serve about 2/3 of all artificially lifted wells
- Bean pumping units are responsible for one-third of the total energy consumed in the oilfield and typically have an energy efficiency of between 12-23%
- 1 kWh Savings = 1.7 lbs. of CO2 Reduced
To learn more about how our products may be able to help your company meet its ESG goals, please contact us directly.
68% of all energy is rejected energy or energy that gets wasted” – Lawrence Livermore National Laboratory
We operate knowing that we impact people, businesses, and the environment every day, and we shoulder that responsibility with respect, gratitude, and the drive to continuously improve” - Robert Lawler, Chesapeake CEO, 2018 Corporate Sustainability Highlights…
…” Performance drives our ESG efforts, not PR. We believe the demand for oil and natural gas will gravitate toward the most efficient producers” Bill Thomas, EOG CEO, Q3 Conference Call
The OSS system is compatible with any VSD that uses a Diode-Bridge Front-end. The OSS system also needs access to the DC bus connections of the VSD. The OSS system is not compatible with the Baker Hughes 6-Step output drive/any Active Front-End VSD.
Compatible VSD OEM’s include but are not limited to Yaskawa, Schneider, Toshiba, Schlumberger, Summit, Triol, Baker Hughes Vector.
The ERT system is compatible with any VSD that uses a Diode-Bridge Front-end. The ERT system also needs access to the DC bus connections of the VSD. The ERT system is not compatible with the Baker Hughes 6-Step output drive/any Active Front-End VSD.
Compatible VSD OEM’s include but are not limited to Yaskawa, Schneider, Toshiba, Schlumberger, Summit, Triol, Baker Hughes Vector.
The block diagram shows the main connections needed to interface the ERT unit with a VSD. The ERT requires a three-phase 480V/60Hz connection from the VSD. This three-phase connection is required to support the independent charging of the ERT’s capacitor bank. This connection is made after the VSD input disconnect. Two of those three-phase lines are connected to the UPS module of the ERT. The output of the UPS module then connects back to the CPT connections inside the VSD. This single-phase 480V/60Hz connection ensures the availability of a 480V supply for the VSD CPTs during the input power disturbances. The DC bus of the VSD is connected to the ERT using the DC disconnect of the ERT unit.
ERT
Multi-Well Configuration
Connect two VSD’s to one ERT, offering a more cost-effective option. Event types and duration should be well understood so as this option does not compromise the ERT’s ability to fully support the application. Please note that the numbers quoted in our ride-through matrix will be reduced when more than one drive is connected. In a multi-well setup, each VSD will run independently, meaning events will be recorded individually.
Utility Over Voltage Mitigation
Prevent VSD component damage resulting from a utility overvoltage condition. Protect your hardware and eliminate costly component replacement. In an overvoltage situation, the ERT will wait for a predetermined time interval before disconnecting the VSD from the utility connection. The ERT will reconnect the system with the utility once line voltages come back to normal range. Note that over-voltage protection will shut down the system to prevent VSD component damages.
The overvoltage range can be set at up to 20% over max voltage, the time duration is user programmable and the waiting period for the system to be reconnected after normal voltage comes back is also user-defined.
IoT – Remote Monitoring
The remote monitoring option will provide the user the ability to keep track of the ERT functions. This is in addition to the information permanently displayed on the HMI locally and recorded internally to the ERT’s PLC SD card. The user can create a custom dashboard to remotely monitor the desired variables like; power disturbance event duration, the maximum current provided the ERT, the operation stages like discharge, ready, discharging of the ERT system, the VSD voltage, and the ERT voltage, etc. The user can be notified of any user-defined event by email. A weekly, or daily report can also be created if required. This remote monitoring platform can also be utilized to create accurate billing information for the customer.
The remote monitoring is based on a cloud-based system with LTE connectivity offering connection in most isolated locations.
Modbus RTU/TCP IP Connectivity
Instead of cloud monitoring, the user can elect to communicate directly with the ERT using the Modbus protocol. The standard Modbus mapping includes most monitored variables as listed below.
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The mod bus mapping can be reconfigured depending on any special requirements.
Private Label
Align ERT with your organizations' branding standards. This can include unit color, logos, and imaging.
Standard Certification
UL & cUL are default certifications. Power Sentry will adopt other certifications on a case-by-case basis.
OSS
IoT – Remote Monitoring
The remote monitoring option will provide the user the ability to keep track of the OSS functions. This is in addition to the information recorded internally to the OSS’s PLC SD card. The user can create a dashboard to remotely monitor the desired variables. The user can be notified of any user-defined event by email. A weekly, or daily report can also be created if required. This remote monitoring platform can also be utilized to create accurate billing information for the customer.
The remote monitoring is based on a cloud-based system with LTE connectivity offering connection in most isolated locations.
Modbus RTU/TCP IP Connectivity
In lieu of cloud monitoring, the user can elect to communicate directly with the OSS using the Modbus protocol. The Modbus mapping can be created to monitor the common variables listed below.
- VSD Bus Voltage
- Fault status report
- Capacitor charging current
Private Label
Align OSS with your organizations' branding standards. This can include unit color, logos, and imaging.
Standard Certification
UL & cUL are default certifications. Power Sentry will adopt other certifications on a case-by-case basis.
Power Sentry has aligned with key partners, strategically positioned to support global sales efforts. Reach out to your local partner today to learn more about Power Sentry.
North America
Carlton Bates Company
Contact
Kevin Downey
Business Development Manager, Oil & Gas
+1 281-780-9377
WESCO International, Inc. | Supply Chain Solutions - Since 1922
South America
Energy Control Systems
Contact
Jeff Edwards
President
+1 817 483 8497 Ext. 102
WhatsApp: +1 817 223 0050
Energy Control Systems - Energy Control Systems (ecsintl.com)
Middle East & North Africa
Harmonic Solutions Oil & Gas
Contact
Ian C Evans
Principal Electrical Engineer
Mob: +971 (0)50 917 8196
Office: +971 (0)7 222 0465
UK Mob & SPM No: +44 (0)774 677 1712
Skype: icevans1
Power Sentry request that our clients provide their own cabling due to the vast number of variances we’ve experienced between locations and customers. The below table provides details of the cable we would supply if tasked with procurement.
|
Cable |
Price Per Foot |
Used for |
Supplied by |
|
HW30701004 |
$2.27 |
480VAC OSS & ERT |
Rexel |
|
OKO 571-31-3204 |
$7.48 |
OSS |
Rexel |
|
HW30935003 |
$33.30 |
ERT |
City Electric Supply |
Both the OSS and ERT are delivered on custom-built wooden pallets. Where this may be suitable for a short period, we advise that a more stable foundation is laid. This can include but is not limited to, pre-poured concrete pads, railroad ties, or metal girders.
Power Sentry is not licensed to terminate electrical connections on the well site. We have chosen to work with our customer's preferred Electrical Contractors to expedite the process. The physical installation of the ERT and OSS products will take around a half-day.
ERT-400 will support your 400 Amp drive for up to 8 seconds during a full three-phase power loss. This assumes that the drive is loaded at 100%. The more common scenario is that the drive is loaded anywhere between 55-95%, and in that case, the ride through capabilities will extend far beyond that of the 8 seconds. This is considered the most extreme case. Sags and brownouts are much less taxing for the ERT, where the technology can provide support for well over 30 seconds in some cases.
| UL, cUL | The UL listing is called a “Third Party Certification”. This certification provides an unbiased safety assurance to interested parties including, the manufacturer, the specifier, and the consumer. UL’s global field reps conduct periodic, unannounced on-site inspections of UL-certified products in the manufacturer’s factory. The product is verified as being fully compliant with a set of rules governing the product. Another part of the agreement is traceable labels. Each product listed must have a label affixed to the product, traceable to the manufacturer through the Underwriters Laboratories. |
| NEMA 3R Enclosure | This ensures reliable outdoor operations. |
| External LED Showing Voltage Presence | LED indicator on the door continues to blink if the storage capacitor voltage or the VSD DC bus voltage is present inside the enclosure. An LED indicator will stop blinking only when the capacitor bank has a safe voltage (less than 20V) and the VSD DC contactor is OFF. |
| Fuse for all Power Connections | This ensures final protection in the case of any unlikely catastrophic failure. All connections are fused at proper current and voltage ratings. |
| Disconnect for VSD Isolation | This ensures a safe separation from the VSDs connected to the Power Sentry units. This is a physical disconnect and therefore offers proper isolation. |
A more comprehensive overview is available in the respective User Manuals.