Unable to Recharge the prepaid meter

Solution: Connectivity Check: Confirm the meter is successfully communicating with the server. Serial Number Verification (SmartComm): Access the SmartComm Customer Master and ensure the serial number recorded matches the physical serial number of the connected meter. Duplicate Configuration Check: Verify that no two meters are incorrectly configured with the exact same serial number in the system.

Email Configuration SMTP Details Outlook

Solution: SMTP Host/Server Name: For Outlook.com: smtp-mail.outlook.com For Office 365/Microsoft 365: smtp.office365.com SMTP Port:587 (recommended) Encryption Method: STARTTLS Authentication: Your email account needs to be authenticated, so enable login or use the ""My outgoing server (SMTP) requires authentication"" option in your email client. Username: Your full Outlook email address (e.g., yourname@outlook.com or yourname@domain.com) Password: Blank

Email Configuration App Password creation for Gmail account

Reason - Gmail will work only with a secure encrypted app password Solution: Go to your Google Account settings. Navigate to the Security tab. If you don't have it enabled, turn on Two-Step Verification. Find and click on App passwords. Select an app name (like ""SMTP"" or ""Mail Client"") and click Generate. Copy the generated 16-character password and use it in your mail client's password field instead of your main Gmail password.

Email Configuration SMTP Details Gmail

Solution: Gmail SMTP Settings SMTP Server: smtp.gmail.com Port: 587: (requires STARTTLS/TLS) 465: (requires SSL) Authentication: Required Username: Your full Gmail address (e.g., user@gmail.com) Password: An App Password generated from your Google Account security settings Security/Connection: TLS or SSL, depending on the port chosen

Transfer existing sensor to a different gateway

Reason - Loss of old data stored under device id created Solution: To prevent data loss, edit the sensor and use the "Move to Gateway" option to transfer the sensor to a different gateway.

Asset list is not available in the filter

Reason - The asset is not assigned to the organization Solution: Check the asset selection settings in organization settings

Reason - Sensor/gateway limit exceeded Solution: Check license information for sensor/gateway limit

Cannot change the ip address of gateway

Reason - The ip address should is not available Solution: 1. if company network is being used check the accesibility to access 2. check if set ip is with in subnet range 3. Check if Primary and Secondary DNS is correct as per network settings 4. Set the Default Gateway IP to match the router's IP or the company network's default gateway IP.

3rd part meter not communication

Reason - 1. Memory map configuration wrong 2. (10 power -4 )Conversion factor is not available in third party memory map configuration 3. Data on modscan and software is matching but not matching with meter display readings Solution: 1. Verify data via Modscan, check wiring, confirm the meter parameter's datatype/function code in the memory map, and ensure the gateway supports that parameter datatype. 2. Can be added from conversion factor available in Master settings

Could not download certificate

Reason - All mandatory fields are not saved in organisation info settings Solution: All details should be given in mandatory field of organisation settings

Advantage of 12kV Impulse withstand Voltage over 8 kV Impulse withstand Voltage

Updated: Aug 31, 2026 | 6 min read

Technical Articles

Published: Mar 06, 2026 by Rajesh R Shirodkar

Technical Articles

Click on any topic to jump to that section

Introduction

Electrical assemblies and plants are susceptible to various types of over voltage, including temporary over voltage from the supply line and more severe transient non-linear overvoltage caused by atmospheric events such as lightning. These transient over voltages can occur directly when lightning strikes the structure or indirectly through electromagnetic fields induced around the impact point.

The capability of the assemblies to withstand such stresses depends all on the dielectric strength of the air between the two live parts carrying the impulse.

Understanding Impulse Withstand Voltage Testing

To assess the capability of electrical assemblies to withstand transient overvoltage, a specific test is conducted. This test involves applying an impulse withstand voltage of 1.2/50 μs, as illustrated in Figure 1, following a detailed procedure.

Application of the impulse withstand voltage

T₁: peak time = 1.2 μs

T₂: time at half value of U = 50 μs

The impulse voltage shall be applied five times at intervals of 1 second minimum between:

All the circuits connected together and the enclosure connected to earth.
Each pole, the other poles and the earthed enclosure connected together.

The test is passed if no discharges are detected.

This test is performed according to Table 10 of the IEC 61439-1, (shown below) which suggests the alternative between effective impulse, alternating voltage (r.m.s. value) and direct voltage, with the value defined as a function of the altitude and consequently of the quality of the ambient air around the assembly under test.

IEC 61439-1, Impulse withstand voltages
Rated impulse withstand voltage Uimp (kV)	Test voltages and corresponding altitudes during test
	U1,2/50, a.c. peak and d.c. (kV) Sea level					a.c. r.m.s. (kV)
	Sea level	200 m	500 m	1000 m	2000 m	Sea level	200 m	500 m	1000 m	2000 m
2,5	2,95	2,8	2,8	2,7	2,5	2,1	2,0	2,0	1,9	1,8
4,0	4,8	4,8	4,7	4,4	4,0	3,4	3,4	3,3	3,1	2,8
6,0	7,3	7,2	7,0	6,7	6,0	5,1	5,1	5,0	4,7	4,2
8,0	9,8	9,6	9,3	9,0	8,0	6,9	6,8	6,6	6,4	5,7
12,0	14,8	14,5	14,0	13,3	12,0	10,5	10,3	9,9	9,4	8,5

IEC 61439-1, Impulse withstand voltages
Rated impulse withstand voltage Uimp (kV)	Test voltages and corresponding altitudes during test
	U1,2/50, a.c. peak and d.c. (kV) Sea level					a.c. r.m.s. (kV)
	Sea level	200 m	500 m	1000 m	2000 m	Sea level	200 m	500 m	1000 m	2000 m
2,5	2,95	2,8	2,8	2,7	2,5	2,1	2,0	2,0	1,9	1,8
4,0	4,8	4,8	4,7	4,4	4,0	3,4	3,4	3,3	3,1	2,8
6,0	7,3	7,2	7,0	6,7	6,0	5,1	5,1	5,0	4,7	4,2
8,0	9,8	9,6	9,3	9,0	8,0	6,9	6,8	6,6	6,4	5,7
12,0	14,8	14,5	14,0	13,3	12,0	10,5	10,3	9,9	9,4	8,5

Verification by assessment (as an alternative to testing) prescribes to verify that clearances between all live parts with risk of disruptive discharges shall be at least 1.5 times the values specified in Table 1 of IEC 61439-1 as shown below. The 1.5 safety factor takes into consideration manufacturing tolerances.

Minimum clearances in air
Rated impulse withstand voltage Uimp (kV)	Minimum clearance (mm)
≤ 2,5	1,5
4,0	3,0
6,0	5,5
8,0	8,0
12,0	14,0
Based on inhomogeneous field conditions and pollution degree 3.

Minimum clearances in air
Rated impulse withstand voltage Uimp (kV)	Minimum clearance (mm)
≤ 2,5	1,5
4,0	3,0
6,0	5,5
8,0	8,0
12,0	14,0
Based on inhomogeneous field conditions and pollution degree 3.

Comparing 8 kV and 12 kV Impulse Withstand Voltages in Busbar Trunking Systems

In the context of busbar trunking systems, the choice between an 8 kV and a 12 kV impulse withstand voltage significantly impacts the system’s ability to withstand lightning surges and switching surges. A 12 kV rating offers more robust protection compared to an 8 kV rating, which is particularly beneficial in areas prone to severe electrical storms or with higher voltage requirements.

While 8 kV may be sufficient for some applications, 12 kV provides a higher margin of safety and can prevent potential damage or outages caused by transient voltage spikes.

Benefits of a 12 kV Impulse Withstand Voltage

Higher Protection Level: A 12 kV rating indicates that the system can withstand higher voltage spikes without failure, which is crucial in areas with frequent lightning strikes or prevalent switching surges.
Enhanced Safety: By providing a greater margin of safety, a 12 kV impulse withstand voltage reduces the risk of insulation breakdown or equipment damage due to transient overvoltages.
Increased Reliability: A higher withstand voltage contributes to the overall reliability of the busbar trunking system, ensuring it operates properly under various electrical conditions.
Potential for Higher Voltage Applications: 12 kV systems are suitable for a wider range of applications and higher voltage levels, whereas 8 kV might be limited to lower voltage applications.

Conclusion

While an 8 kV impulse withstand voltage can be adequate for certain applications, a 12 kV rating provides a more robust and reliable solution for busbar trunking systems. The higher rating offers enhanced protection against transient over voltages, ensuring better long-term performance, especially in areas with higher voltage requirements or severe electrical conditions. Therefore, choosing a 12 kV impulse withstand voltage can be a prudent decision for ensuring the resilience and reliability of electrical systems against transient over voltages.

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About the Author

Rajesh R Shirodkar,

DGM-Corporate Communication

Rajesh Shirodkar is a seasoned marketing and business leader with over 20 years of experience in the automation and electrical industry, spanning marketing communications, sales, business development, and software solution selling. He has led successful brand transformation initiatives and high-impact marketing programs, including branding and account-based marketing campaigns, as well as industry events that drive visibility, engagement, and growth. With expertise in brand building, lead generation, solution selling, and sales enablement, Rajesh is known for translating technology and business offerings into compelling value propositions and delivering sustainable growth through strong stakeholder collaboration.