PSA Series Open Cage Polymeric Surge Arresters

Fully compliant with IEC 60099-4 standards, the PAS series is ideal for a wide range of applications ,including ubstations, transmission lines, and distribution networks.
They are designed to maintain stable performance even in the harshest environmental conditions, ensuring maximum system safety and equipment longevity.

Benefits of PAS Series Polymeric Surge Arresters:

Tested in accordance with IEC 60099-4 at independent accredited laboratories ensuring reliable performance
● Superior protection margins for enhanced reliability
● Direct molded housing design to prevent moisture ingress
● Low residual voltage, reducing stress on the system
● Excellent high-energy handling capacity
● Exceptional TOV (Temporary Over voltage) performance
● Safe non-shattering short circuit behavior,capable of handling higher current levels
● Maintenance-free design, reducing operational costs
● Hydrophobic silicone housing, resistant to tracking and erosion
● Excellent cantilever and tensile strength
● Outstanding mechanical strength, vibration,and impact resistance
● High-quality design and manufacturing
● ISO 9001 and ISO 14001 compliant

Excellent hydrophobicity	Safe short circuit failure	Superior TERT performance

PSA design consists of the following components:

1. ZnO (Zinc Oxide) varistors
2. Silicone rubber housing
3.Flame-retardant FRP structure
4. Corrosion-resistant aluminum fittings

PSA Series Construction

At the heart of the GOTO PSA design lies our advanced ZnO varistor disc, which boasts exceptional thermal and electrical prpperties, along with outstanding stability. The innovative combination of the upgraded varistor and PSA design delivers remarkable energy handling capabilities and enhanced TOV performance. This superior thermal efficiency results in products with:
● Exceptional TOV performance.
● Safe,non-shattering failure mode during short circuit tests, achieved by pre-failing at higher fault currents.
● High energy absorption capacity.The crimped structural design ensures a lightweight product without compromising mechanical strength.
Our manufacturing process guarantees a void-free structure and optimal sealing at the interfaces.This is accomplished by directly bonding the silicone housing to the ZnO discs and aluminum fittings using GOTO’s proprietary bonding solution.

PSA Silicone Hydrophobic Features

Alternating sheds for enhanced resistance to pollution flashover
●Exceptional TERT (Thermal Aging) performance
● Housing subjected to IEC 1ooo-hour salt fog test
● Constant voltage:4.5kV, >360 minutes Step voltage: >300 minutes
● All failures are caused by erosion only, with no tracking observed during voltage testing

Components of PSA1:
1. Birdcap
2. Corrosion resistant aluminium fittings
3. Silicone rubber housing Mould in Place
4. ZnO varistors
5.Flame retardant FRP structure
6. Bracket
7. ELD Earth clamp

PSA1 Open Cage Polymeric Surge Arresters- Class1 Application

Designed to protect MV networks and equipment from lightning and switching surge-related overvoltages in areas with higher iso-keraunic levels.Ideal for both indoor and outdoor installations, offering protection for transformers and cable terminations.

Generic technical data

Temporary overvoltage (TOV) of PSA1 with prior energy
Sample temperature (pre-heated): 60°C as per IEC 60099-4.
The TOV curve applies to an arrester with pre-stress a pplied before TOV verification.T
his pre-stress simulates a 100kA, 4/1Ous high curren impulse, in accordance with the operating duty test.
UTOV = TOV withstand voltage;
UC= continuous operating voltag

PSA1 Standard electrical data

Uc: Continous Voltage; Ur: Rated Voltage; Ures: Residual Voltage

PAS1-Standard housing parameters

PSA1	Sheds	Impulse voltage 12/50μs (kV)	Power frequency withstand voltage wet(kV)	Flash over distance (mm)	Creepage length (mm)	Height L (mm）	Weight (approx)(mm)	Tested in accordance with IEC 60099-4
3-6	5	145	47	154	435	175	1.8
8-10	5	145	47	154	435	175	1.8
12	5	145	47	154	435	175	1.8
14-16	7	165	57	195	585	215	2.2
18	9	180	70	237	738	258	2.68
20	9	180	70	237	738	258	2.68
21/22/24	11	200	80	279	888	299	2.97
28-30	13	230	95	320	1030	340	3.4
32	15	250	110	363	1180	383	3.7
36	17	275	125	402	1340	425	3.97

PSA Open Cage Polymeric Surge Arresters – Class 2 Application

Suitable for protecting medium voltage (MV) networks, sensitive equipment, and substations against lightning and switching surge-related overvoltages in areas with relatively high iso-keraunic levels.

Generic technical data

Temporary overvoltage (TOV) of PSA2 with prior energy
Temperature of Samples (Pre-heated): 60°C, as specified in IEC 60099-4.
Tov Curve: Applies to an arrester that has been pre-stressed prior to Temporary Overvoltage (TOV) testing.
The pre-stress consists of two long-duration current impulses,each with a duration of 20o0 us and a total energy of 6.0 kJ per kV of the rated continuous operating voltage (Uc).

PSA2 Standard electrical data

Uc: Continous Voltage; Ur: Rated Voltage; Ures: Residual Voltage

PAS -Standard housing parameters

PSA2	Sheds	Impulse voltage 12/50μs (kV)	Power frequency withstand voltage wet(kV)	Flash over distance (mm)	Creepage length (mm)	Height L (mm)	Weight (approx) (mm)	Tested in accordance with IEC 60099-4Notes: Mechnical strength data:Cantilever Nm 350 Tensile kN 2 Torque Nm 50
03	5	145	47	154	435	175	1.8
04	5	145	47	154	435	175	1.8
05	5	145	47	154	435	175	1.8
06	5	145	47	154	435	175	1.95
08	5	145	47	154	435	175	1.95
09	5	145	47	154	435	175	1.95
10	5	145	47	154	435	175	2
12	5	145	47	154	435	175	2
15	7	165	57	195	585	215	2.45
18	0	180	70	237	738	258	2.68
20	9	180	70	237	738	258	2.68
21	11	200	80	279	888	299	2.97
22	11	200	80	279	888	299	2.97
24	11	200	80	279	888	299	2.97
29	13	230	95	320	1030	425	3.25